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PROTECTING YOUR WORLD

Mobile Home
Roof Coating
& Repair Guide

Acrylic, silicone, aluminum or sprayed polyurea? We make coatings, so we show the label math others skip: gallons, dry mils, 2026 costs, what survives standing water, and four calculators.
Mobile Home Roofs

Done patching the same leaks? Get a quote from a certified applicator.

Tell us about the home and the roof. We'll connect you with an ArmorThane-certified applicator who can look at it and quote a seamless sprayed membrane, with the film thickness in writing.

  • Single-wides, double-wides and park homes
  • Metal, TPO and EPDM roofs
  • Film thickness and warranty on the quote
  • Park owners: ask about coating several homes
Rather talk now? Call (417) 831-5090
Step 1 of 3
22%
AC savings, white-coated double-wide
FSEC Florida field study
48 hr
Standing-water limit before coating
Kool Seal product data sheet
$0.50–$4.50
Pro coating cost per sq ft
HomeGuide 2024 · Angi 2026
1,604
Sq ft per gallon at 1 wet mil
231 in³ spread 0.001 in thick (our math)

A mobile home roof has a hard life. It's big, low and nearly flat, it bakes all summer, and the metal moves every time the sun comes up or goes down. The right coating keeps it tight for years. The wrong one traps water, peels in sheets, or makes every future repair a compatibility problem.

Quick answer

Most mobile home roofs can be coated if they're metal, membrane or spray foam, structurally sound, and drain within 48 hours after rain. Shingled roofs can't. Use a 100% silicone where water stands, a two-coat acrylic elastomeric where it drains, and a sprayed polyurea membrane from a certified applicator when you're done recoating. Fix leaks, seams and rust first. A coating isn't a repair.

We make coatings, so this guide runs on data sheets, not star ratings: coverage, film thickness, rain times and warranty fine print, with four calculators to do the math. We don't make the retail products compared here. Our sprayed polyurea systems get their own section at the end, trade-offs included.

Start here

What kind of roof does your mobile home have?

Mobile home roofs come in four main types: low-slope metal (flat or bowstring), pitched asphalt shingle, a membrane or metal roof-over, and spray foam. Metal, membrane and foam can usually be coated. Shingles can't. The home's age matters too, because June 15, 1976 changed the rules.

Mobile home vs manufactured home: the 1976 line

To HUD, a manufactured home, "formerly known as a mobile home," is built to the federal HUD Code (24 CFR Part 3280). Every one built after June 15, 1976 is certified, with a label on each section (the "HUD tag") and a data plate inside whose maps show the roof-load and wind zones it was built for.

HUD zoneDesign valueWhere / what it means
Roof load, North40 psf live loadListed Maine counties and all of Alaska
Roof load, Middle30 psfListed northern states and counties
Roof load, South20 psfEverywhere else
Wind Zone II / III100 / 110 mphRoof tie-downs at 24 in / 16 in or less
24 CFR 3280.305(c) and (e). Pre-1976 homes predate these standards.

Flat and bowstring metal roofs

The classic roof is a galvanized steel or aluminum sheet fastened at the perimeter J-rail with butyl tape and sheet-metal screws, and left "loose everywhere else so it can expand and contract" (Foremost). That's why Foremost says to check the existing rumble buttons, the fasteners in rows across some roofs, and not add more. Older flat roofs "required a lot of maintenance and recoating because water could not easily drain off," as one roofer's history puts it.

Pitched shingle roofs

Field roof coatings are off the table. Henry calls its 887 silicone "not recommended over shingles of any kind," Kool Seal's elastomerics are "not for use on roof shingles," and FarmPaint excludes shingled roofs. See roof waterproofing methods compared for the alternatives.

Roof-overs: TPO, EPDM, metal and spray foam

A roof-over puts a new roof on the old one: a TPO or EPDM membrane, metal over 2x4 framing, a pitched conversion, or sprayed polyurethane foam (SPF). Membranes can usually be coated after cleaning and an adhesion test. Foam must be: the IRC calls for a protective coating 2 to 72 hours after the foam goes on, and allows recoating a foam roof without tear-off. Our spray foam roofing page covers foam roof-overs with ArmorFoam Roof 200, a closed-cell roofing foam at 2.5–3.0 pcf.

A 60-second check

Can your mobile home roof be coated?

Yes, if it's sound, dry underneath, not shingled, and sheds water within 48 hours. A coating waterproofs a surface. It doesn't restore one. Soft spots, rust-through, wet insulation or two old roofs stacked up mean you're into repair or replacement. If the insulation needs work too, see our mobile home insulation guide.

Gloved hand resting on a badly cracked, alligatored old roof coating
Alligatored coating has to be dealt with first. If it's an old fibered black or silver coating, have it tested before you scrape.
What you findWhat it meansRule source
Asphalt shinglesNo field roof coatingHenry, Kool Seal, FarmPaint labels
Soft or spongy spotsDeck or framing damage: repair firstIRC R908.3.1.1
Wet insulationDry out or replace; a coating seals water inIRC R908.3.1.1
Two or more roof coveringsNo more re-covers: tear offIRC R908.3.1.1
Rust-through, holes, open seamsRepair firstNationwide
Water standing 48+ hoursFix the sag or drainage firstKool Seal; HUD 3280.305(h)(2)
Thick old fibered coatingDon't sand or grind; test itASTM D2823 (withdrawn); EPA
Sound metal, membrane or foam that drainsGood candidateUse the selector
The IRC governs site-built homes, not HUD-code homes; we borrow its re-cover rules because they're sound. For permits, ask your state's manufactured-housing agency (SAA) or local building department.

Ponding is a structural problem

HUD requires roofing membranes "of sufficient rigidity to prevent deflection which would permit ponding of water" (24 CFR 3280.305(h)(2)). So water that sits for days usually means something sagged: a truss, the joint between sections, or the sheet itself. Coating the puddle doesn't fix it, and Kool Seal requires drains "or other corrective measures" for ponding that lasts beyond 48 hours.

Will a coating overload the roof?

Not a roll-on one. Two coats of acrylic add roughly 0.14 lb per sq ft dry (our math from Nationwide's 11.9 lb/gal and 60% weight solids), against HUD roof live loads of 20–40 psf. For thicker sprayed systems, ask for the density on the data sheet and the weight at your specified thickness.

Mobile home roof repair

Mobile home roof repair: find the leak first

Most mobile home roof leaks start at the edges and openings, not the middle of the sheet. Foremost's checklist: "The J-rail. The flashing around vents, pipes and skylights. The seams and roof sealant. All existing rumble buttons (don't add anymore!). Any rusted or worn-looking areas." Fix those, then decide whether the roof needs a coating at all.

Walk it safely. Keep your weight on the trusses (typically 16 or 24 inches on center) or the edges, on a board "at least ½ inch thick, two feet wide and four feet long" (Foremost). Henry says to check the owner's manual first. Stay off wet metal.

What you seeLikely sourceFix
Stain along an outside wallJ-rail: dried butyl tape, loose screwsRemove failed sealant, reset or replace screws, reseal with a sealant compatible with the coating to follow.
Stain around a vent, stack or skylightFlashing or sealant at the penetrationClean and reseal. HUD: penetrations must be "properly flashed and sealed."
Drip line along a seamOpen or failed seamReinforce with polyester fabric or seam tape set in sealant (Kool Seal, Nationwide).
Spot leak mid-roofRumble button or screw backed outTighten or replace and seal the head. Don't add new ones.
Rust spots or pinholesCorrosionWire-brush, rust-prime, patch with patching cement lapped 1 inch past the damage (Foremost).
Water standing 48+ hoursSag in the sheet, trusses or marriage lineStructural repair before any coating.
Soft underfootWet or rotted decking or insulationRepair or replace. Don't coat.
Ceiling stain, roof looks fineWater entered upslope and traveledTrace it back; the method in our RV roof repair guide works on any low-slope roof.

If the repair list keeps growing, that's information too. A roof with dozens of rusted fasteners and failing seams is a restoration job; see repairing leaking metal roofs.

Know the chemistry

Mobile home roof coating types compared

Four families cover the shelf: acrylic (elastomeric), silicone, aluminum/asphalt and urethane-enhanced. Professionals add spray polyurea. On a mobile home they differ most in whether they survive standing water, how cold it can be when they go on, and what can go over them later.

TypeStanding waterMin. tempRain-safeCoverage per coatWarrantiesRecoat withPro $/sq ftDIY
Acrylic elastomericNo: softens45–50°F2–6 hr50–150 sq ft/gal5–12 yrAcrylic or silicone$0.65–$1.75Yes
100% siliconeYes35°F15–60 min50–100 sq ft/galLifetime limitedSilicone only$1.50–$2.50Yes
Fibered aluminum / asphaltNo50°F4–24 hr50–100 sq ft/gal3–12 yrAcrylic (base coat) or silicone$1.25–$2.50Yes, slow
Urethane-enhanced whiteYes––100 sq ft/gal25 yr limitedCheck maker$2–$5Yes
Spray polyureaYes-20°F (SureGrip)Tack-free 15–90 sec60–125 mils, 1–2 passesBy applicatorTest first$3.00–$6.00No
From Nationwide, Kool Seal, Henry and Jetcoat data. Pro costs: Angi (Aug. 2026); polyurea from our roof coating guide, which rates silicone highest for ponding water. A dash means not published.

Acrylic (elastomeric) coatings

Water-based, affordable, easy to roll, bright white when new. Nationwide's Mobile Home Roof Coating, Henry's 287/587/687 and Kool Seal's elastomerics are all acrylics. The category spec, ASTM D6083, called for at least 50% volume solids, 100% elongation and 200 psi tensile when new, per IIBEC's 2001 summary; the standard has since been revised (D6083/D6083M-24). The weak spot is water: acrylics "will soften and eventually fail under prolonged standing water" (US Made Supply). More in our elastomeric coating guide.

Silicone coatings

Silicone's selling point is ponding. Henry markets 887 Tropi-Cool with "permanent ponding water resistance" for "RV, trailer, and mobile home roofs": one coat at 1.5 gal per 100 sq ft, 35°F to 120°F, rain-safe in 15 minutes. The catch comes later. Acrylic "does not reliably bond to cured silicone, and the field result is peeling in sheets," so once a roof is silicone, plan on silicone. One park owner on a Mobile Home University forum reported Henry silicone still performing after five years across 100 homes (an anecdote, not a test).

Aluminum and asphalt coatings

The old silver standby, and Foremost still recommends an aluminum-base coating for patch work. Cheap, but slow and short-lived: Kool Seal's fibered aluminum is 45% volume solids, can't go on below 50°F, needs 3–5 days between coats and carries a 3-year warranty. Jetcoat's says "Do not apply to roofs which hold water." Henry's rubberized 869 is the long-warranty exception at 12 years.

Urethane-enhanced and spray polyurea

Henry 817 Roof Guard is a urethane-enhanced white at 1 gal per 100 sq ft with a 25-year limited warranty and a ponding-resistance claim. Spray polyurea is a different animal: two components mixed at the gun and sprayed hot, building 60–125 mils of dry film in one or two passes (our roof coating guide) against 16–20 from a two-coat roller job. It's professional-only; see the polyurea section.

What goes over what: recoat compatibility

The most expensive mistake on a coated roof is a new coating that won't stick to the old one.

Existing surfaceNew acrylicNew siliconeNew aluminumSprayed polyurea
Bare galvanized or aluminumYes; prime rustYesYesYes (ArmorFlex UV lists metal)
Old aluminum / asphalt coatingYes, with base coatYes (Henry)YesAdhesion test first
Old acrylic / elastomericYes (Kool Seal)Yes (Kool Seal)–Adhesion test first
Old siliconeNo: "peeling in sheets"Yes, abraded or tie-coated–Unverified: test required
TPO or EPDMEPDM (Kool Seal)Aged single-ply (Henry)–Yes (our RV roof page)
Spray foamASTM D6083 (IRC)ASTM D6694 (IRC)–SPF + polyurea systems
Asphalt shinglesNoNoNo–
"Yes" = the maker lists that substrate or the cited source says it works; a dash means not listed, not approved. Our roof coating guide says a small-patch adhesion test "should be performed before any full-scale roof application" (pull testing per ASTM D4541).
Sealant or coating?

Mobile home roof sealant vs roof coating

The difference

Roof sealant is for joints: seams, the J-rail, vents, pipes and screw heads. Roof coating is for the field, the whole sheet between them. A bead of sealant can stop a leak at a vent but can't protect a rusting roof, and a coating can't bridge an open seam. Most roofs need sealant work first, then coating.

JobWhat to useSource
J-rail and edgeButyl tape under the rail, compatible sealant over edge and screwsForemost
Vents, stacks, skylightsSealant compatible with the roof and the coatingHUD 3280.305(h)(4)
SeamsPolyester fabric or seam tape set in sealant or base coatKool Seal; Nationwide
Holes and rustRust primer, then patching cement lapped 1 inchForemost
The whole roofCoating: see the selector–

Two rules. First, compatibility: HUD asks for "a compatible sealant" at joints between dissimilar materials, one that can "accommodate expansion and contraction" (24 CFR 3280.307). Silicone caulk under an acrylic coating has the same problem as a silicone roof. Second, let sealant cure before coating over it. Our RV roof sealant guide compares common lap sealants and tapes by data sheet, including those wait times.

Interactive tool 1 of 4

Which mobile home roof coating should you use?

It depends on four things more than brand: what's on the roof now, whether water stands on it, how long you'll keep the home, and who's doing the work. Answer six questions and the selector sorts the options into best fit, also works and avoid, with a reason and source for each.

Coating selector

Match the coating to your roof, drainage and timeline

Rules come from manufacturer labels, the HUD Code and the IRC. Always read the label of the exact product you buy.

Water stands 48+ hours after rain?
Who's doing the work?
Acrylic elastomeric, 2 coatsBest fit+1 more below
Best fit

Acrylic elastomeric, 2 coats

Two coats over clean, primed metal is the standard budget system.

  • 1 gal/100 sq ft per coat (Henry); 50–150 sq ft/gal on other labels
  • Apply at 45–50°F and up; 2–6 hours before rain
  • Warranties 5–12 years by grade (Henry, Kool Seal)
Best fit

100% silicone

One coat covers it, and it bonds to clean metal.

  • 1.5 gal/100 sq ft in one coat (Henry 887), or two coats at 100 sq ft/gal (Kool Seal Tundra)
  • 35–120°F; rain-safe in 15 minutes (Henry 887)
  • Lifetime limited warranty (Henry 887, Kool Seal Tundra); future recoats are silicone only
Also works

Urethane-enhanced white (e.g., Henry 817)

A middle tier with a longer warranty.

  • 1 gal/100 sq ft (Henry 817)
  • 25-year limited warranty
  • “Permanent ponding water resistant” (Henry)
Also works

Fibered aluminum coating

Fine for a low-cost refresh; Foremost recommends an aluminum-base coating for patch work.

  • 50–100 sq ft/gal per coat (Kool Seal); 1.25–2 gal/100 sq ft (Henry 555)
  • 50°F and up; 3–5 days between coats (Kool Seal)
  • 3–12-year warranties (Kool Seal, Henry)
Professional option

Sprayed polyurea membrane

ArmorFlex UV bonds to metal and forms a seamless membrane over seams and fasteners. Needs professional plural-component spray equipment, so it’s a hire-out even if you do the prep.

  • 60–125 mils of dry film (ArmorThane roof coating guide)
  • Gels in 3–15 seconds; walk-on in under an hour
  • $3.00–$6.00 per sq ft installed; 15–25-year service life (roof coating guide)
  • Warranty set by the certified applicator
Prep checklist
  • Fix open seams, loose fasteners and rust spots first: “Leaks must be repaired before any coating is applied” (Nationwide). Patch holes with patching cement lapped 1 inch past the damage (Foremost).
  • Reattach or replace loose screws; don’t add new rumble buttons (Foremost).
  • Wire-brush rust and prime it with a rust primer (Kool Seal, Nationwide).
  • On galvanized metal, check adhesion on a test patch after 48 hours (Nationwide).
  • Pick a dry window above the label’s minimum temperature (most acrylics and aluminums: 50°F; Henry 887: 35°F).

Hot climate: a white or reflective finish earns its keep here. In Florida field tests, a double-wide with a white-coated metal roof saved 22% on air conditioning (FSEC).

Next: work out gallons and cost for your pick, or get a sprayed-roof quote to compare.

Interactive tool 2 of 4

How much roof coating does a mobile home need?

At 1 gallon per 100 sq ft per coat, two coats on a 16x80 single-wide (about 1,280 sq ft) take roughly 26 gallons before waste. A one-coat silicone at 1.5 gallons per 100 sq ft takes about 19. Your number depends on the label rate, the coats and the real roof size, so let the calculator do it.

Roof coating calculator

Roof area, gallons, pails, cost and film thickness

Picking a system fills in its label coverage, coats, pail size and, where we checked it, the shelf price. Every field stays editable.

Measure the roof, not the listing
Gal per 100 sq ft? Enter 100 ÷ it
Blank = unknown
Our assumption: 10% roll, 15% spray
1,281
Roof area (sq ft)
28.2 gal
Coating incl. waste
6 x 5 gal
Pails to buy
$480
Material cost

Area: 1,280 sq ft plan x slope factor 1.0009 = 1,281 sq ft. Film: 1,604 ÷ 100.0 = 16.0 wet mils per coat, about 8.0 dry at 50% volume solids, so 16.0 dry mils over 2 coats. Before coating, inspect and reseal about 192 linear ft of J-rail and roof edge.
Defaults: Coverage assumed at Henry’s acrylic rate (1 gal/100 sq ft per coat); $79.98 per 5 gal observed at Home Depot, Sept. 2026. 50% volume solids is the ASTM D6083 minimum, not a Lanco figure. Acrylics need a roof that drains within 48 hours; they soften under standing water.
Rather not recoat every few years? Compare a sprayed membrane over 20 years.

Product (type)Label coverage per coatCoatsWet mils per coatPail, price seen
Henry 887 Tropi-Cool (silicone)1.5 gal/100 sq ft124.14.75 gal, $369.00
Kool Seal Tundra (silicone)50 or 100 sq ft/gal1–232.1 or 16.05 gal
Henry 287/587/687 (acrylic)1 gal/100 sq ft–16.0–
Kool Seal Elastomeric (acrylic)50–100 sq ft/galBase + 216.0–32.1–
Nationwide (acrylic)100–150 sq ft/gal210.7–16.0–
FarmPaint 7-Year (elastomeric)250–350 sq ft per pail221.8–30.54.75 gal, $75.68
Kool Seal Fibered Aluminum50–100 sq ft/gal216.0–32.1–
Henry 555 (fibered aluminum)1.25–2 gal/100 sq ft–20.1–32.1–
Jetcoat Cool King (aluminum)70–100 sq ft/gal on metal–16.0–22.9–
ArmorThane spray polyurea≈26.7 at 60 mils; ≈13.4 at 1201–2 passes60–125 (= dry)Applicator
Sortable. Wet mils = 1,604 ÷ sq ft per gallon (our math). Prices seen Sept. 26, 2026 at Home Depot and FarmPaint; Lanco White-Seal was $79.98 per 5 gal. Dashes: not published in what we reviewed.

Why other calculators disagree: some online guides assume 30–40 sq ft per gallon for every coating, which puts two coats on a 1,000 sq ft roof at 50–67 gallons. At the rates the makers publish, it's 13–40 gallons depending on the product. Overbuying two to four times over is an expensive way to learn to read a label.

Interactive tool 3 of 4

Wet mils vs dry mils: how thick is your roof coating?

A gallon is 231 cubic inches. Spread 1 mil (0.001 inch) thick, it covers 1,604 sq ft. So wet mils = 1,604 ÷ the label's sq ft per gallon, and dry mils = wet mils x volume solids. At 100 sq ft per gallon and 50% volume solids, each coat dries to about 8 mils. Few labels print it; Nationwide's warranty does, requiring 16 dry mils (20 with its primer).

Label-to-mils checker

Turn a label's coverage rate into film thickness

Start from a product or type in your own label. If the data sheet doesn't list volume solids, leave it blank for wet mils only.

The label gives coverage as
For sq ft per pail only
100.0
Sq ft per gallon, per coat
16.0
Wet mils per coat
8.0
Dry mils per coat
16.0
Total dry mils
Your coating (dry)
16.0
Nationwide min., no primer
16
Nationwide min., with primer
20
Supplier guidance
20–30
Parts-counter RV coatings
30–40
1/16 inch
62.5
ArmorThane RV roof spec
120
Sprayed polyurea (our guide)
60–125

Your 2 coats leave about 16.0 dry mils (0.016 in), about 26% of 1/16 inch. To reach 20 dry mils in 2 coats at this solids level, you’d need about 80 sq ft per gallon per coat (1.25 gal per 100 sq ft). Formula: wet mils = 1,604 ÷ sq ft per gallon; dry mils = wet mils x volume solids.

Benchmarks: Nationwide warranty minimums (16 and 20 dry mils); the 20-mil film ASTM D6083 uses for its permeance test (IIBEC); supplier guidance of 20/25/30 dry mils at 1.5/2/2.5 gal per 100 sq ft (US Made Supply, an industry guide); 30–40 mils for "parts-counter" RV coatings and our 120-mil RV roof spec (ArmorThane RV roof business page); 60–125 mils for sprayed polyurea (our roof coating guide). For 100%-solids polyurea, wet and dry film are the same. A wet-film gauge lets you check each coat as you roll it.

Do it once

How to coat a mobile home roof, step by step

Pick a dry stretch above the label's minimum temperature, fix leaks and seams, pressure-wash and dry the roof, prime where the label says, detail the seams, then roll two coats at the label rate in opposite directions. Most coating failures are prep failures, not product failures.

  1. Pick your weather window

    Most acrylics and aluminums need 50°F or warmer (Nationwide allows 45°F); Henry 887 goes on from 35°F. Match the forecast to the rain-safe time in the table below. Our piece on how weather affects coating application covers dew point.

  2. Find and mark the leaks

    Work the J-rail, penetrations, seams, rumble buttons and rust with the leak finder, staying on the trusses. Chalk-mark each spot so none get lost after washing.

  3. Clean it

    Pressure-wash at 1,500 psi or more with water and chlorine (Nationwide) or 2,000 psi (Kool Seal). Treat mildew with diluted bleach, then rinse with strong detergent (Foremost); Henry suggests TSP or a TSP substitute. Let it dry at least 12 hours.

  4. Repair

    "Leaks must be repaired before any coating is applied" (Nationwide). Reattach loose screws, reinforce open seams with fabric or tape, and patch holes with patching cement lapped 1 inch.

  5. Prime where the label says

    Rusted metal gets a rust primer. On galvanized or previously coated metal, Nationwide says to test adhesion after 48 hours; its optional primer raises the warranty minimum to 20 dry mils.

  6. Detail the seams and flashings

    Brush coating onto seams, the J-rail, vent flanges and patches first, embedding fabric where the label calls for it.

  7. First coat at the label rate

    Work in sections (Nationwide suggests 1,000 sq ft) with a 1-inch-nap roller, or an airless sprayer of 1 GPM or more with a .021–.025 tip. Check wet mils with a gauge: Nationwide's warranty depends on a minimum dry film, so too thin can cost you the warranty.

  8. Second coat crosswise, then inspect

    Wait out the recoat window below, roll the second coat at right angles to the first, and walk the cured roof for pinholes and thin spots. After that, Henry recommends inspecting and cleaning mobile home roofs three to four times a year.

ProductMinimum temperatureRain-safeBetween coats
Henry 887 silicone35°F (to 120°F)15 minOne coat
Kool Seal Tundra silicone–60 min6 hr; full cure 72 hr
Nationwide acrylic45°F2–4 hr12 hr+
Kool Seal Elastomeric–4–6 hr24 hr
Kool Seal Fibered Aluminum50°F4–6 hr3–5 days
Jetcoat Cool King50°F for the next 12 hr24 hr–
ArmorThane sprayed polyurea-20°F (SureGrip)Tack-free 15–90 secWalk-on under 1 hr
Each maker's product page or data sheet; polyurea times from our roof coating guide, -20°F from the SureGrip product page.
Energy

Will a white roof coating cool your mobile home?

In hot climates, measurably. In a Florida Solar Energy Center field study, whitening roofs cut air-conditioning energy by an average of 19%, and a double-wide manufactured home with a corrugated metal roof saved 22%. Savings fade as the white weathers, and in cold climates a white roof can cost more in heating than it saves in cooling.

FindingNumberSource
AC savings, 9 whitened buildingsAvg 19% (2–43%); peak 22%FSEC-PF-293-95
Double-wide, metal roof22% AC savingsFSEC, Site 8
Roof surface temperature150°F+ dark; 50°F+ cooler if reflectiveU.S. DOE
Peak cooling demand11–27% lowerU.S. EPA
Indoor max temp, no AC2.2–5.9°F lowerU.S. EPA
Reflectance aging, sample product0.87 new, 0.77 at 3 yearsDOE cool roof guidelines

FSEC also saw reflectance degrade after a year outdoors, and DOE says "most weathering or soiling occurs during the first year or two." In cold climates, DOE warns cool roofs "can increase energy costs" when the heating penalty beats the cooling savings; a gray or tan (Henry sells 887 in both) is a fair compromise up north.

Shopping notes: ENERGY STAR stopped certifying roof products in June 2022, so look for a Cool Roof Rating Council listing, which reports initial and aged reflectance and emittance. And bigger claims you'll see online, like 20–70% savings or "a third of your heat comes through the roof," we couldn't trace to a study, so we don't use them.

2026 prices

How much does mobile home roof coating cost in 2026?

Professional mobile home roof coating runs about $0.50 to $4.50 per sq ft (HomeGuide 2024; Angi 2026), mostly depending on chemistry. DIY materials run about $0.32 per sq ft for two coats of a budget acrylic and $1.17 for one coat of a premium silicone. A sprayed polyurea membrane is about $3 to $6 per sq ft installed.

DIY material (Sept. 2026)Shelf priceRate usedPer sq ft16x80 roof, 10% waste
Lanco White-Seal acrylic, 2 coats$79.98 / 5 gal1 gal/100 sq ft (assumed)$0.326 pails, about $480
FarmPaint 7-Year, 2 coats$75.68 / 4.75 gal250–350 sq ft per pail$0.43–$0.619–12 pails, $681–$908
Henry 887 silicone, 1 coat$369.00 / 4.75 gal1.5 gal/100 sq ft$1.175 pails, about $1,845
Our math from prices seen at Home Depot and FarmPaint. Buying in volume: a park owner on the Mobile Home University forum reported $350 per pail of Henry silicone, $314 at eight or more (2024).
Pro installed, per sq ftAngi (Aug. 2026)HomeGuide (Apr. 2024)ArmorThane guide16x80 single-wide*32x60 (1,920 sq ft)*
Acrylic / elastomeric$0.65–$1.75$0.50–$3.00$1.50–$4.00$832–$2,240$1,248–$3,360
Silicone$1.50–$2.50$1.50–$4.50$2.50–$5.50$1,920–$3,200$2,880–$4,800
Polyurethane$2–$5$1.50–$4.00–––
Spray foam + coating–$2.00–$6.00$4.00–$8.00––
Sprayed polyurea––$3.00–$6.00$3,840–$7,680$5,760–$11,520
*Our math: area x Angi's range (acrylic, silicone) or ArmorThane's (polyurea). Excludes repairs, tear-off and permits. Angi's average roof coating project: $1,476 ($543–$2,528).

Replacing instead? HomeGuide puts mobile home roof replacement at $3–$8 per sq ft, or $1,500–$9,600 for a single-wide and $3,000–$16,000 for a double-wide. Metal runs $5–$16 per sq ft (30–80-year life), TPO and EPDM $4–$10 (10–25 years). A roof-over is $800–$2,900 as a DIY kit or $1,000–$4,500 installed, and tear-off adds $1–$2 per sq ft.

Interactive tool 4 of 4

Coat, roof-over or replace? 20-year cost comparison

Over 20 years, a DIY acrylic recoated every seven years is usually cheapest on paper, as long as your own labor is free. A sprayed polyurea membrane costs more up front and wins on labor, disruption and seams, not always on dollars. The comparator runs the recoat cycles for your roof and how long you'll stay.

20-year comparator

What each option costs over the years you'll own the home

Each option is bought again whenever its service life runs out. Every cost and life is editable.

Follows the calculator until you edit it
Optional; 0 = simple totals
OptionCost per cycleLife (yr)Default source
DIY acrylic, 2 coats
$/sq ft
Lanco price, 2 coats; Henry 287 7-yr warranty
DIY 100% silicone, 1 coat
$/sq ft
Henry 887 price; HomeGuide 10–15 yr
DIY fibered aluminum, 2 coats
$/sq ft
Enter your price; 3–7-yr warranties
Pro acrylic
$/sq ft
Angi midpoint; our guide 10–15 yr
Pro silicone
$/sq ft
Angi midpoint; 15 yr
Sprayed polyurea (applicator)
$/sq ft
Midpoints of $3–$6 and 15–25 yr (our guide)
Membrane roof-over (TPO / EPDM)
$ per roof
HomeGuide $1,000–$4,500 midpoint
Metal roof replacement
$/sq ft
HomeGuide $5–$16, 30–80 yr
DIY acrylic, 2 coats
Lowest total cost
$1,230
Its cost over 20 years
$5,765
Sprayed polyurea, 20 years

Cost per year of protection

DIY acrylic, 2 coats
$61/yr
DIY 100% silicone, 1 coat
$150/yr
Pro acrylic
$154/yr
Pro silicone
$256/yr
Sprayed polyurea
$288/yr
Membrane roof-over
$275/yr
Metal roof replacement
$673/yr

Each option is paid for again whenever its life runs out, starting today. Cheapest on paper is DIY acrylic, 2 coats, but that’s 3 rounds of your own washing, repairs and coating in 20 years, and your labor isn’t counted. Sprayed polyurea is bought once in this horizon. No credit is given for life left over at the end (see the last column). DIY fibered aluminum, 2 coats: enter a cost and life to include it.
Market ranges from HomeGuide (Apr. 2024), Angi (Aug. 2026) and ArmorThane; excludes repairs, permits and inflation. Get a written quote.

OptionCost per cycleCyclesTotal, 20 yrPer yearLife left at year 20
DIY acrylic, 2 coats Lowest$4103$1,230$611 yr
DIY 100% silicone, 1 coat$1,4992$2,998$15010 yr
Pro acrylic$1,5372$3,074$1540
Pro silicone$2,5622$5,124$25610 yr
Sprayed polyurea$5,7651$5,765$2880
Membrane roof-over$2,7502$5,500$27510 yr
Metal roof replacement$13,4511$13,451$67320 yr
Roof area 1,281 sq ft. DIY acrylic example: 3 cycles x $410 = $1,230. Present value discounts each purchase by (1 + rate)^year.

Read it honestly. DIY acrylic usually wins on dollars, but that's three rounds of washing, repairs and two coats on a roof you have to walk safely each time. Sprayed polyurea wins when you count your time, the seams it removes and how long you'll stay. Selling within three years? Don't buy a 20-year roof.

The fine print

How long does mobile home roof coating last, and what does the warranty cover?

Product warranties run from 3 years (fibered aluminum) through 5–12 years (acrylics) and 25 years (Henry 817) to "lifetime limited" (Henry 887, Kool Seal Tundra). That beats the old "recoat every two years" advice as a guide. But read the remedy: most retail warranties replace the product, not the labor, and some exclude leaks outright.

ProductWarrantyRemedy and conditions
Kool Seal Fibered Aluminum3 yrProduct or refund only; "Labor or costs associated with labor not included"
Jetcoat Cool King3-yr "protection"–
Henry 555 / 558 aluminum7 yr limited–
Henry 287 / 587 / 687 acrylic7 / 10 / 12 yr limited–
Kool Seal Elastomeric5–12 yr by grade12-yr grade "Meets ASTM D 6083 and Title 24"
FarmPaint 7-Year White7 yrNot for gravel, "dead level (flat)" or shingled roofs
Nationwide10-yr writtenLeaks not covered; 16 dry mils minimum (20 with primer)
Henry 869 rubberized aluminum12 yr limited–
Henry 817 urethane-enhanced25 yr limited–
Henry 887 / Kool Seal TundraLifetime limited–
ArmorThane sprayed polyureaSet by the applicatorGet terms and film thickness in writing
Product pages, data sheets and Henry's 2024 catalog. A dash: no remedy terms in what we reviewed; ask before you buy.

Note FarmPaint's flat-roof exclusion if your roof is flat or bowstring. Real-world life depends on film build, drainage and sun: HomeGuide lists 7–20 years for acrylic and 10–15 for silicone, and our roof coating guide gives sprayed polyurea 15–25. Inspect three to four times a year (Henry), recoat on condition (chalking, thin spots, bare metal), and keep receipts, batch numbers and dated photos for any warranty claim.

Before you go up

Safety notes for mobile home roof work

Four hazards come with this job: falls, old coatings that may contain asbestos, lead dust from old paint, and solvent-based products. None is a reason to skip the work. All are reasons to plan it.

Old fibered coatings and asbestosASTM D2823 covered asphalt roof coatings made with "mineral stabilizers including asbestos fiber"; it was withdrawn in 2014 with no replacement, and EPA lists coatings among asbestos-containing products. On an older home with a thick black or silver fibered coating, don't sand, grind or scrape aggressively. Have a sample tested first. See lead and asbestos encapsulation for the encapsulation option.
  • Lead. Kool Seal's aluminum data sheet warns about lead dust when removing old paint. Don't dry-sand it.
  • Falls. Dry days only, trusses and edges only, a spreader board, and a harness where you can anchor one.
  • Solvents. Asphalt and aluminum coatings can carry Prop 65 warnings (Jetcoat's does). Follow the label's ventilation and PPE instructions.
Off the recoat treadmill

The permanent option: a sprayed polyurea roof

Every coating above is a maintenance cycle. A sprayed polyurea membrane is closer to a new roof: two components mixed at the gun, sprayed hot, gelling in seconds into one seamless skin over the sheet, the seams, the J-rail and every penetration.

For most mobile home roofs we'd point to ArmorFlex UV, a "two-component, 1:1 ratio, 100% solids, fast-set" aliphatic polyurea formulated to stay color-stable. It "forms a continuous, seamless membrane of any desired thickness" on metal, fiberglass, wood and more, and our ArmorLine index lists it at 740% elongation. The two-step alternative is SureGrip soft polyurea under ArmorDeck Topcoat, the pairing we spec for RV roofs.

Two applicators in coveralls spraying a liquid-applied roof membrane from a heated hose on a low-slope roof
Plural-component spray equipment builds a seamless membrane in one visit.
60–125 mils

Dry film thickness

Range in our roof coating guide; our RV roof spec is 120. A two-coat roller job dries to about 16–20.

3–15 sec

Gel time

Tack-free in 15–90 seconds and walkable in under an hour. No multi-day wait between coats.

$3–$6 / sq ft

Installed cost

With a 15–25-year service life (our roof coating guide). About $3,840–$7,680 on a 16x80.

What to ask for

Thickness is the applicator's call for your roof, and it belongs on the quote, along with how it's checked (our roofing page lists ASTM D7091 for thickness and ASTM D4541 for adhesion). Over existing silicone, insist on the adhesion test; we haven't verified polyurea bonding to silicone as a blanket rule. Ask for the data sheet, including density, so you know what the film adds. And fix any sag first. A seamless membrane doesn't straighten a truss.

Why it isn't DIY

Polyurea "requires professional-grade plural component spray equipment" (our polyurea RV roof coatings page). It's heated to about 150–160°F and sprayed at 2,000–3,000 psi, and it gels in seconds, so equipment and technique decide whether it bonds.

The honest trade-offs

  • It costs more up front: about $3,840–$7,680 on a 16x80, against roughly $480 in DIY acrylic materials.
  • Payback depends on how long you stay. Under three years, it rarely makes sense. Run the 20-year comparison.
  • Warranties come from the applicator, so get them in writing.
  • ArmorSeal 100 AL, our aluminized roofing liner, is aromatic: outdoors it needs a UV topcoat or ColorCoat within 12 hours.

For park owners and landlords

Coating a row of homes is a different job from coating one: one crew and rig moving home to home, one written spec for every roof, one contact for warranty questions. Ask an applicator about scheduling a block of homes; price depends on access, prep and each roof's condition. See ArmorFlex UV aliphatic polyurea for the system and metal roof waterproofing for larger buildings.

For roofers and RV techs

Add sprayed mobile home roofs to your services.

Many mobile home roofs are low-slope metal or membrane, the kind of surface a sprayed membrane is made for. If you already do RV roofs, it's the same equipment. No franchise fees, no royalties; we supply equipment, material and training, with starter packages from $25,000 for low pressure.

Straight answers

Mobile home roof coating FAQ

What is the best coating for a mobile home roof?

There's no single best one; it depends on drainage and what's on the roof now. Where water stands more than 48 hours, use a 100% silicone (Henry markets 887 with "permanent ponding water resistance") or have a sprayed polyurea membrane installed. On a well-drained metal roof, a two-coat acrylic elastomeric is the budget pick. Never coat asphalt shingles: Henry and Kool Seal both exclude them, and the coating selector sorts out the rest for your roof.

How often should you recoat a mobile home roof?

Older advice says every two years (Foremost), but current products carry 7- to 12-year (acrylic), 25-year (urethane-enhanced) or lifetime-limited (silicone) warranties, per Henry's 2024 catalog. Inspect and clean the roof three to four times a year, as Henry recommends, and recoat when you see chalking, thin spots or bare metal rather than on a calendar.

How many gallons of roof coating does a single-wide need?

A 16x80 roof is about 1,280 sq ft (HomeGuide). At 1 gallon per 100 sq ft per coat, two acrylic coats need about 26 gallons before waste, and a one-coat silicone at 1.5 gallons per 100 sq ft needs about 19. Add roughly 10% for waste and run the calculator for your size and product.

How much does it cost to coat a mobile home roof?

HomeGuide (2024) and Angi (2026) both put professional mobile home roof sealing at $0.50–$4.50 per sq ft. DIY materials run about $0.32 per sq ft for two coats of an $80 five-gallon acrylic, or about $1.17 per sq ft for one coat of a $369 silicone (prices observed September 2026). A sprayed polyurea membrane runs about $3–$6 per sq ft installed, per our roof coating guide.

Can I put elastomeric (acrylic) roof coating over silicone?

No. Acrylic doesn't reliably bond to cured silicone and tends to peel in sheets, according to industry guidance. Recoat silicone with silicone after cleaning and abrading it, or have an applicator run an adhesion test before any other system goes on.

Aluminum or white roof coating: which is better on a mobile home?

Fibered aluminum coatings are cheap, but the ones we checked carry 3- to 7-year warranties and can't sit under standing water (Kool Seal, Jetcoat). White acrylic or silicone reflects more sunlight, and the U.S. Department of Energy says a reflective roof can stay more than 50°F cooler. In cold climates, though, a white roof can add heating cost (DOE).

Will a roof coating lower my cooling bill?

In a Florida Solar Energy Center field study, whitening roofs cut air-conditioning energy an average of 19%, and a double-wide manufactured home with a metal roof saved 22%. Results ranged from 2% to 43%, and reflectance dropped after the first year of weathering. Savings are largest in hot, sunny climates.

Can you coat a shingled mobile home roof?

Not with a field roof coating. Henry says its silicone is "not recommended over shingles of any kind," and Kool Seal's coatings are "not for use on roof shingles." Repair or replace the shingles, or have a roofer look at a system rated for your slope.

What temperature do you need to apply mobile home roof coating?

Most acrylic and aluminum products need 50°F or warmer and no rain in the forecast (Foremost, Kool Seal, Jetcoat); Nationwide allows 45°F. Henry 887 silicone can go on from 35°F to 120°F and is rain-safe in 15 minutes. Professionally sprayed polyurea such as ArmorThane SureGrip can be applied down to -20°F.

Do I have to fix ponding water before coating?

Yes. Manufacturers require correcting water that stands more than 48 hours (Kool Seal), and the HUD Code requires roof membranes rigid enough to prevent ponding (24 CFR 3280.305(h)(2)). On a manufactured home, ponding usually means a sag in the framing or roof sheet. Repair it, then use a ponding-rated coating such as silicone.

Is a roof-over better than a roof coating?

A roof-over (TPO, EPDM or metal on new framing) replaces the surface and costs about $1,000–$4,500 installed, or $800–$2,900 as a DIY kit (HomeGuide 2024). A coating is cheaper per cycle but needs periodic renewal. The 20-year comparison shows which wins for how long you'll own the home.

What's the best mobile home roof sealant?

The one that's compatible with your roof and with whatever coating goes over it. Use butyl tape under the J-rail with a compatible sealant over the edge and screws, a compatible sealant at vents and stacks, and polyester fabric or seam tape at seams. Skip silicone caulk if an acrylic coating will ever go on the roof, since acrylic doesn't reliably bond to cured silicone. Our RV roof sealant guide compares common lap sealants by data sheet.

Where do mobile home roofs usually leak?

At the edges and openings. Foremost's checklist is the J-rail, the flashing around vents, pipes and skylights, the seams and old roof sealant, existing rumble buttons, and any rusted or worn areas. Water can travel before it shows up on the ceiling, so trace a stain upslope before you seal anything.

Does a roof coating warranty cover leaks?

Usually not. Retail coating warranties typically replace the product or refund its price and exclude labor; Kool Seal's says "Labor or costs associated with labor not included." Nationwide's 10-year warranty excludes leaks and requires a minimum dry film thickness. With a sprayed polyurea roof, the certified applicator sets the warranty terms, so get them in writing.

AT
ArmorThane Technical Team · Springfield, Missouri
Written from manufacturer data sheets, code text and 35+ years of spraying and supporting applicators. Last updated September 26, 2026.

Methodology and sources

Product figures come from each maker's data sheet, product page or catalog. Film thickness, per-square-foot costs and worked examples are our math. Retail prices were seen on September 26, 2026. HUD Code text is from 24 CFR Part 3280; IRC text is from the 2015 edition (Seattle), used as context only.

  1. HUD, manufactured home resources: hud.gov/hud-partners/manufactured-home-resources
  2. 24 CFR 3280.305, structural design requirements (eCFR): ecfr.gov/current/title-24/subtitle-B/chapter-XX/part-3280/subpart-D/se
  3. 24 CFR 3280.307, exterior coverings and sealants (eCFR): ecfr.gov/current/title-24/subtitle-B/chapter-XX/part-3280/subpart-D/se
  4. 2015 IRC chapter 9 as published in the Seattle Residential Code (PDF): seattle.gov/documents/Departments/SDCI/Codes/SeattleResidentialCode/20
  5. IIBEC, ASTM D6083: what it says and what it means (2001): iibec.org/publication-post/astm-d-6083-standard-specification-for-liqu
  6. ASTM D6083/D6083M-24: store.astm.org/d6083_d6083m-24.html
  7. ASTM D2823, asbestos-containing asphalt roof coatings (withdrawn): store.astm.org/d2823_d2823m-05r11e01.html
  8. U.S. EPA, learn about asbestos: epa.gov/asbestos/learn-about-asbestos
  9. U.S. DOE Energy Saver, cool roofs: energy.gov/energysaver/cool-roofs
  10. U.S. DOE, guidelines for selecting cool roofs (2010, PDF): energy.gov/sites/prod/files/2013/10/f3/coolroofguide.pdf
  11. U.S. EPA, using cool roofs to reduce heat islands: epa.gov/heatislands/using-cool-roofs-reduce-heat-islands
  12. Florida Solar Energy Center, FSEC-PF-293-95: fsec.ucf.edu/en/publications/html/FSEC-PF-293-95/index.htm
  13. Cool Roof Rating Council, home and building owners: coolroofs.org/resources/home-building-owners
  14. Henry retail product catalog (06/24, PDF): dam.carlisle.com/asset/1a7b0464-4df2-41c3-b0f0-74a1feb6431d/Retail-Pro
  15. Henry 887 Tropi-Cool sell sheet (PDF): dam.carlisle.com/asset/da72c3c5-e8e8-4976-99c8-679763990f3d/887-Tropi-
  16. Henry 887 Tropi-Cool product page: henry.com/residential/products/residential-roof-coatings/white-roof-co
  17. Henry RV, trailer and mobile home roof brochure (PDF): dam.henry.com/asset/ee8e2bbc-87cb-4fe2-b7f7-27c83c23badb/RV-Trailer-an
  18. Kool Seal Elastomeric Finish Coat, 5-year: koolseal.com/product/elastomeric-finish-coat-5yr/
  19. Kool Seal Premium Elastomeric Finish Coat, 12-year: koolseal.com/product/premium-elastomeric-finish-coat-12yr/
  20. Kool Seal Tundra silicone roof coating: koolseal.com/product/tundra-silicone-rubberized-white-roof-coating/
  21. Kool Seal fibered aluminum KS0024300 data sheet (PDF): koolseal.com/wp-content/uploads/2018/03/KS0024300-PDS.pdf
  22. Nationwide Coatings, Mobile Home Roof Coating: nationwidecoatings.com/pl/mobile-home-roof-coating
  23. Nationwide Coatings, how to apply mobile home roof coatings (2024): nationwidecoatings.com/blog/Everything-You-Need-to-Know-About-Mobile-H
  24. Jetcoat, Cool King fibered aluminum: jetcoatinc.com/products/cool-king-3-year-fibered-aluminum-roof-and-mob
  25. FarmPaint, 7-Year White Elastomeric: barnandfencepaint.com/product.php?productid=16180&cat=252&page=1
  26. Home Depot, mobile home roof coatings (prices observed Sept. 26, 2026): homedepot.com/b/Building-Materials-Roofing-Commercial-Roofing-Roof-Coa
  27. Foremost, mobile home roof coating guide: foremost.com/learning-center/coating-your-roof/
  28. Foremost, repairing a metal roof: foremost.com/learning-center/repairing-a-metal-roof.asp
  29. Resilient Roofing, mobile home roofing options (2022): resilientroofing.com/blog/mobine-home-roofing-options
  30. Mobile Home University forum, best roof solutions: forum.mobilehomeuniversity.com/t/best-roof-solutions-for-mobile-homes/
  31. US Made Supply, what is an elastomeric roof coating (2026): usmadesupply.com/resources/guides/what-is-an-elastomeric-roof-coating
  32. HomeGuide, roof coating cost (Apr. 2024): homeguide.com/costs/roof-coating-or-sealing-cost
  33. HomeGuide, mobile home roof replacement cost (Apr. 2024): homeguide.com/costs/mobile-home-roof-replacement-cost
  34. Angi, roof coating cost per square foot (Aug. 2026): angi.com/articles/how-much-does-roof-coating-cost-square-foot.htm
  35. ArmorThane, roof coating guide: armorthane.com/knowledge-center/roof-coating-guide/
  36. ArmorThane, roof waterproofing guide: armorthane.com/protective-coatings/roofing/
  37. ArmorThane, metal roof waterproofing: armorthane.com/protective-coatings/metal-roof-waterproofing/
  38. ArmorThane, RV roof coatings: armorthane.com/protective-coatings/rv-roof-coatings/
  39. ArmorThane, RV roof repair guide: armorthane.com/rv-roof-repair-guide/
  40. ArmorThane, how to start an RV roof business: armorthane.com/start-an-rv-roof-repair-business/
  41. ArmorThane, ArmorLine product index: armorthane.com/products/armorline-products/
  42. ArmorThane, ArmorFlex UV: armorthane.com/products/armorline-products/high-pressure/armorflex-uv/
  43. ArmorThane, SureGrip soft polyurea: armorthane.com/products/armorline-products/high-pressure/suregrip-soft
  44. ArmorThane, ArmorSeal 100 AL: armorthane.com/products/armorline-products/high-pressure/armorseal-100
  45. ArmorThane, ArmorFoam Roof 200: armorthane.com/products/armorfoam-products/roof-200/

Stop recoating every few years.

Certified ArmorThane applicators spray a seamless polyurea membrane over sound metal and membrane mobile home roofs, with the thickness and warranty in writing. Contractors: we make the material, build the rigs and train your crew, with no franchise fee.

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