Skip to content
ARMORTHANE PROTECTING YOUR WORLD

PROTECTING YOUR WORLD

ARMORTHANE PROTECTING YOUR WORLD

Liquid-Applied
Waterproofing
Membranes

Polyurea, polyurethane, PMMA, rubberized asphalt and cementitious membranes compared: ASTM specs, thickness in mils, surface prep, leak testing and liquid vs sheet.
Waterproofing Quotes

Need a membrane specified, sprayed and tested? Get a quote from a certified applicator.

Tell us what you're waterproofing (a foundation, plaza or parking deck, roof or tank) and roughly how many square feet. We'll connect you with an ArmorThane-certified applicator who sprays seamless polyurea membranes to a written thickness.

  • Seamless spray polyurea, 100% solids
  • Surface prep and minimum dry mils on the quote
  • Foundations, decks, roofs and tanks
  • Contractors: ask about becoming a waterproofing applicator
Rather talk now? Call (417) 831-5090
Step 1 of 3
40+ mils
Waterproofing-grade film thickness
W. R. Meadows; dampproofing is about 10
353–658%
Elongation, two pure polyurea membranes
VersaFlex and Tecnopol data sheets
≤4 in.
Water depth in an ASTM D5957 flood test
Deeper needs a structural engineer’s approval
1,604
Sq ft per gallon at 1 dry mil, 100% solids
231 cu in per gallon ÷ 0.001 in

A liquid-applied waterproofing membrane goes on as a fluid and cures into one continuous rubbery layer, with no laps or seams to leak. The catch: it's only as thick, as well bonded and as pinhole-free as the crew made it that day. The spec and the field testing matter as much as the chemistry.

Quick answer

A liquid-applied waterproofing membrane is a fluid coating, such as polyurea, polyurethane, PMMA, rubberized asphalt or a polymer-modified cement, that cures into a seamless, self-flashing layer. Waterproofing grade starts around 40 mils; hot rubberized asphalt goes on at 185–215 mils. Buried or covered membranes are specified to ASTM C836, exposed traffic decks to C957. Pick a membrane or size it.

ArmorThane makes spray polyurea and polyurethane systems in Springfield, Missouri, and trains the certified applicators who install them. Polyurea is one family on this page, not the answer to every job; where another membrane fits better, we say so. This guide is for owners, facility managers, specifiers and contractors. Homeowners with a damp basement will find our concrete waterproofing guide a plainer read.

What's in this guide
  1. 1What a liquid membrane is
  2. 2Membrane types compared
  3. 3Where each type is used
  4. 4Membrane selector (interactive)
  5. 5ASTM standards that matter
  6. 6Thickness, mils and solids
  7. 7Coverage calculator (interactive)
  8. 8Surface preparation
  9. 9Field testing: holiday, flood, ELD
  10. 10Liquid vs sheet membranes
  11. 11What it costs
  12. 12Liquid membrane FAQ
The basics

What is a liquid-applied waterproofing membrane?

It's a waterproofing layer built on site from a liquid that's sprayed, rolled or troweled onto concrete, masonry, metal or a roof. IIBEC's below-grade design guide says fluid-applied systems cure "to a monolithic, rubberized solid." Because the liquid wraps pipes, drains, corners and changes in plane, the membrane flashes itself instead of relying on lapped seams, and it accommodates movement.

The families run from polyurea, polyurethane, PMMA and PUMA (a polyurethane-methacrylate hybrid) to silicone, acrylic, rubberized asphalt and polymer-modified cement.

Waterproofing is not dampproofing

W. R. Meadows draws the line: waterproofing uses materials of 40 mils or more that stay flexible in the cold and bridge cracks up to 1/16 inch; dampproofing is normally about 10 mils. Dampproofing slows soil moisture. It isn't built to hold back water under hydrostatic pressure. Henry's 789 fibered asphalt emulsion, for example, is sold as damp-proofing, not as a membrane.

Positive side or negative side

The positive side is where the water comes from: the outside of a foundation wall, the top of a deck. IIBEC prefers positive-side placement and calls negative-side (interior) systems "susceptible to failure" under hydrostatic pressure. That's why good foundation waterproofing starts with excavation, not a coat of paint on the basement wall.

Check the quoteA thin sprayed asphalt coat may be dampproofing, not waterproofing. Ask for the product name, the ASTM specification it meets and the minimum dry thickness in mils, in writing.
Chemistries

Liquid membrane types, compared

One representative product per family, as its maker publishes it. Other products in the same family differ, so treat this as a map, not a specification.

Family (example)What stands outCure and serviceWatch-outs
Pure spray polyurea (VersaFlex FSS 50DM+, Tecnocoat P-2049)100% solids, 0 VOC; 3,217 psi and 353% elongation (VersaFlex); 658% elongation, 1.5 mm minimum (Tecnocoat)Tack-free in 5–7 s (VersaFlex); walkable in about 3 h, vehicles in about 12 h (Tecnocoat)Needs spray equipment; aromatic grades need an aliphatic topcoat in sun
Single-component polyurethane (TREMproof 250GC)Meets ASTM C836; 600% elongation; goes on damp and green concreteBackfill in 6–12 h at 75°F; up to 120 wet mils per liftVOC up to 177 g/L; 120 days’ sun at most
Polyurethane traffic coating (Vulkem 360NF+/346/346)ASTM C957; 25–40 mil base (550% elongation) under 15-mil top coatsService in 24 h; vehicles 72 h after cureSlower return to service
Reinforced PMMA (Siplast Parapro)90 mils with polyester fleece; VOC under 25 g/LRain-safe in 30 min, walkable in 2 h at 68°F; winter grade to 23°F35% elongation at peak, reinforced
PUMA (Henry Pumadeq)Solvent-free; constant immersion; zero pitchSets in 30 min; traffic after 1 h; low-temperature applicationCompare numbers on the current data sheet
Hot rubberized asphalt (Henry 790-11)185 mils single layer or 215 reinforced; 0.016 perms; 0 VOCHeated to 356–392°F on siteBridges only non-moving cracks to 1/16 in.; must be covered
Asphalt emulsion (TREMproof 260)64% solids at 60 wet mils; 800% elongation; passes C1305Backfill after 16–24 hUV exposure 30 days at most
Cementitious slurry (SikaTop Seal 107)Two 40-mil coats; breathable at 18 perms; watertight to 3 bar (99 ft)Applies at 45°F and upAbout 25% flexibility; "Cannot bridge moving cracks"
Silicone (Henry Pro-Grade 988)Solvent-free; rated for permanent ponding water; over 50 mils in one coatRain-safe in 15 min; 35–120°FRoof coating; elongation data not verified
Acrylic (Henry Pro-Grade 280)Water-based; up to 12-year warranty within a restoration systemNot statedNo elongation or permeance published
Manufacturer data sheets and product pages listed in the sources (editions 2015–2026). Perms measure water vapor transmission (ASTM E96).

Pure polyurea, hybrids, aromatic and aliphatic

The Polyurea Development Association defines polyurea as an isocyanate reacted with amine-terminated resins, with no intentional hydroxyl groups. Hybrids add hydroxyl (polyurethane) components, so ask which one your quote is for. The PDA says polyurea cures from −25°F to over 300°F, even in high humidity.

Aromatic grades have limited color stability outdoors; aliphatic grades hold color but cost more. So exposed aromatic membranes get an aliphatic topcoat, and Tecnopol says its P-2049 "requires solar radiation protection." Our elastomeric coating guide gives ArmorThane's ranges, and our polyurea waterproofing page shows them at work.

Applications

Where each membrane is used

Exposure decides the membrane more than brand does. Will it be buried, paved over, driven on, left in the sun or kept under water?

Below grade

Backfilled walls and split slabs

C836-class liquids, asphalt emulsions and spray polyurea, which VersaFlex lists for below-grade work. Stay on the positive side. See retaining wall waterproofing.

Negative side

Interior basement walls

The fallback when you can't dig. A cementitious slurry breathes but can't bridge moving cracks, and IIBEC warns these systems are prone to failure under hydrostatic pressure.

Protected decks

Plaza, podium and bridge decks

Hot rubberized asphalt, C836 liquids and PUMA under pavers, soil or asphalt. See plaza deck and bridge deck waterproofing.

Exposed traffic

Parking decks and balconies

C957 traffic coatings, PUMA, or polyurea under an aliphatic topcoat. See polyurea deck coatings and, for homes, deck waterproofing.

Roofs

Flat and low-slope roofs

Reinforced PMMA, silicone where water ponds, acrylic restoration coatings and polyurea with a UV-stable topcoat. See polyurea flat roof waterproofing.

Immersion

Tanks, ponds and water features

Polyurea, PUMA and polyurethanes approved for submerged service, spark-tested for pinholes. See concrete tank waterproofing.

Interactive tool 1 of 2

Liquid membrane selector

Choose the application and tick any constraints. The selector ranks membrane families from the data-sheet figures above and names the governing spec and field tests. The designer of record still writes the spec.

Membrane selector

Which liquid membrane fits this job?

One representative product per family. Confirm every choice against the current data sheet.

Constraints
1-part polyurethane
Best-fit family
ASTM C836
Governing spec
D4414 · D7234
Field tests to ask for

Below grade, backfilled. Work on the positive (water) side before backfill; IIBEC calls negative-side systems susceptible to failure under hydrostatic pressure. ASTM C836 covers this service. Ask for C1305 crack-bridging data and wet-film readings, and protect the membrane from job-site punctures before backfill. Tick a constraint to re-rank the list.

Good fit

Single-component polyurethane

Meets C836; goes on damp and green concrete; 600% elongation; backfill in 6–12 hours at 75°F.

Example: TREMproof 250GC

Good fit

Spray polyurea (pure)

100% solids, 0 VOC, tack-free in seconds, 353–658% elongation. Aromatic grades need an aliphatic topcoat in sun.

Example: VersaFlex FSS 50DM+, Tecnocoat P-2049

Workable

Polymer-modified asphalt emulsion

64% solids at 60 wet mils; 800% elongation; passes C1305. Backfill after 16–24 hours.

Example: TREMproof 260

Limited

Cementitious slurry

Two 40-mil coats; breathable at 18 perms. About 25% flexible, so it can’t bridge moving cracks.

Example: SikaTop Seal 107

Specifications

The ASTM standards that matter

Two ASTM specifications define most building membranes, and a few test methods appear on nearly every data sheet. Know what each covers before you compare numbers.

StandardWhat it coversWhat to ask
ASTM C836/C836M-18High-solids, cold liquid-applied membrane for decks and walls under hydrostatic pressure that get a wearing course, traffic course or backfill. Tests include low-temperature crack bridging, adhesion after water immersion and extensibility after heat aging.The spec for buried and covered membranes. Does the product conform, and at what thickness?
ASTM C957/C957M-17Membrane with an integral wearing surface for pedestrian, vehicular and high-abrasion decks not under hydrostatic pressure. Adds weathering, abrasion and chemical resistance; tests need at least a 20-mil (0.5 mm) base coat.The spec for exposed traffic decks. It doesn't replace C836 below grade.
ASTM C1305Crack bridging at low temperature, when a membrane is least flexible. One lab describes cycling a 1-inch strip to a 1/8 in. (3.2 mm) opening. Current edition: C1305/C1305M-25."Pass" means little without the conditions. Ask for the report.
ASTM D412 and D624Tensile strength, elongation and tear strength of elastomers. D412's Method A and Method B "do not produce identical results."Compare elongation only when the method matches.
ASTM E96/E96M-22aWater vapor transmission, by the desiccant or water method.Vapor-tight or breathable? Hot rubberized asphalt rates 0.016 perms; one cementitious slurry, 18.
ASTM D7234-22 (D4541-22)Pull-off adhesion with portable testers: D7234 on concrete, D4541 on metal and other rigid substrates.Use D7234 on concrete, and don't compare results across instrument types.
Scope wording from ASTM's standard summaries for the editions shown; C1305 setup from Matest Labs (July 2026).
Read "pass" with careData sheets often report C1305 simply as "Pass." One polyurea data sheet we downloaded, a 2018 version, stated only PASS, with no crack width or temperature. When crack bridging matters, ask for the lab report.
Mils and solids

How thick should a liquid membrane be?

Thickness is specified in mils, thousandths of an inch; 40 mils is about 1 mm. What counts is the dry film thickness left after cure. Wet film equals dry film divided by volume solids, so a 100%-solids polyurea ends as thick as it went on, while TREMproof 260 at 64% solids and 60 wet mils ends about 38 mils dry, by our arithmetic.

Dampproofing, typical
10 mils
C957 base coat, test minimum
20 mils
TREMproof 260 emulsion
≈38 dry
Waterproofing minimum
40 mils
Pure polyurea (1.5 mm min.)
≈59 mils
Cementitious, two coats
80 mils
Reinforced PMMA
90 mils
Hot asphalt, single layer
185 avg.
Hot asphalt, reinforced
215 mils

W. R. Meadows, ASTM C957 and Tremco, Tecnopol, Sika, Siplast and Henry data sheets. The polyurea bar converts Tecnocoat P-2049's 1.5 mm minimum to mils.

Specs often give an average and a minimum (Henry's 790-11 single layer averages 185 mils, minimum 125). Write the minimum into the contract and check it with gauge readings.

Interactive tool 2 of 2

Membrane thickness and coverage calculator

Enter the area and the dry thickness you need. The calculator converts it to wet mils at the product's volume solids and gives coverage, total gallons and the number of passes.

Coverage calculator

How much membrane, and how thick wet?

Uses 1,604 sq ft per gallon at 1 mil and 100% solids. Picking a type fills in its published solids and thickness; you can overwrite either.

From the product data sheet
Waterproofing: 40 mils or more
TREMproof 250GC: 120 per lift; SikaTop Seal 107: 80 per coat
60 mils
Wet film to apply
26.7
Sq ft per gallon, theoretical
82 gal
Material with allowance
1
Passes or lifts

60 wet mils leaves 60 dry mils (1.52 mm) at 100% volume solids. Theoretical coverage is 1,604 × 1.00 ÷ 60 = 26.7 sq ft per gallon. With a 10% allowance, 2,000 sq ft takes about 82 gallons, or 4.11 gallons per 100 sq ft. That’s in waterproofing range (40 mils or more, per W. R. Meadows); the data sheet’s minimum still governs. No per-pass limit entered; the PDA says polyurea can go on at any thickness in one application. Rough concrete, block and overspray use more than theory.

Surface preparation

Surface prep: profile, pH and moisture

ICRI Guideline 310.2R-2013 sets ten concrete surface profile (CSP) benchmarks, from CSP 1 (nearly flat) to CSP 10 (amplitude over 1/4 inch), and describes what each prep method can achieve. Sherwin-Williams' specification guidance ties the profile to the film build.

Coating buildSurface profile
Thin film, up to 20 milsCSP 2–3
Medium film, up to 40 milsCSP 3–5
High-build, ultra-high-solidsCSP 3–5
Laminates and self-leveling mortarsCSP 4–6
Repair mortars and reinforced systemsCSP 5–9
Sherwin-Williams Protective and Marine, which also calls for SSPC-SP13/NACE No. 6 alongside ICRI 310.2R and a final surface pH of 10 or higher.

  1. Let the concrete cure

    IIBEC recommends at least 7 days before membrane work, with 28 days optimal. A few products, such as TREMproof 250GC, are made for damp or green concrete.

  2. Profile it

    Grind or blast to the CSP on the data sheet and compare with ICRI's replica chips. Remove laitance, curing compounds and old coatings.

  3. Check pH and moisture

    Aim for pH 10 or higher, and run a moisture check such as ASTM D4263 before coating.

  4. Detail first

    Treat cracks, joints, corners, drains and penetrations before the field coat. Moving joints need their own detail.

  5. Apply and gauge

    Measure wet film as you go (ASTM D4414) and record readings by date, area and batch.

Applicator spraying a red-brown waterproofing membrane onto an exterior concrete foundation wall before backfill
Positive-side work: the membrane goes on the exterior face before backfill.

For the spray side of prep, see our guide to prepping concrete surfaces for spraying.

Quality control

Field testing: holiday, flood and ELD

A seamless membrane with one pinhole is a leaking membrane. These are the field tests to write into the specification.

ASTM D4414

Wet-film gauge

Notched gauges read wet thickness during application, 0.5–80 mils or 1–100 mils by procedure. ASTM calls them "neither accurate nor sensitive," so take many readings; they catch thin spots.

ASTM D4787

Holiday (spark) testing

A high-voltage spark tester finds pinholes, voids, holidays, cracks and conductive inclusions in nonconductive linings on concrete. Most useful on tanks and immersion work.

ASTM D5957

Flood testing

For horizontal waterproofing on slopes of 2% or less, like plaza decks and parking garages over occupied space; not roofing. Pond 4 in. or less and wait 24 hours after installation (48 below 10°C, 50°F).

ASTM D7877

Electronic leak detection

Electrical conductance methods locate leaks in exposed or covered membranes on roofs, plaza decks, pools, water features and covered reservoirs.

ASTM D7234

Pull-off adhesion

A portable tester measures how strongly the membrane bonds to concrete. Stick with one instrument type; ASTM warns against comparing across them.

Sequence

Test before you bury it

Flood test and leak survey before pavers, soil, topping or backfill go on. Afterward, finding a breach means removing what sits on top.

Liquid or sheet

Liquid membrane vs sheet membrane

Sheet membranes are factory-made at a uniform thickness and installed in overlapping rolls. Henry's Blueskin WP200, for example, is 60-mil self-adhered SBS rubberized asphalt on HDPE film in 36-inch rolls, rated for hydrostatic head up to 231 ft. Each approach wins somewhere.

FactorLiquid-appliedSheet
SeamsNone; self-flashing at corners and penetrationsLaps shingled to shed water; seams need careful detailing
ThicknessSet by the crew; verified with wet-film readingsUniform from the factory
Backfill or coverAfter cure: 6–12 h (TREMproof 250GC), 16–24 h (TREMproof 260)Immediately, per Henry for WP200
Weak spotThin spots and pinholes; job-site puncturesJoints, laps, seams and changes in plane
LaborMay drop by up to 60% vs sheet, per the Construction SpecifierBaseline
IIBEC (Stewart and DuPont, 2009), The Construction Specifier (2020; the labor figure is the publisher's claim), Henry and Tremco data sheets.

Sheet is often the sensible pick on simple walls you want to backfill the same day, or where the spec wants factory-controlled thickness. Liquid earns its place on congested decks full of drains and penetrations, on irregular shapes, and wherever laps would sit in standing water.

Budget

What a liquid membrane costs

Installed prices swing with access, prep, thickness and market. Here's what published cost guides and one building-envelope contractor report. We found no sourced side-by-side price for liquid vs sheet on the same job, so we don't quote one.

SourceScopeInstalled, per sq ft
HomeGuide (Jan. 2026)Residential basement waterproof membrane$4–$7
HomeGuide (Jan. 2026)Waterproof paint or sealer$2–$10
Angi (July 2026)Basement waterproofing (damp-proofing $3–$6)$5–$10
Fixr (Feb. 2026)Basement waterproofing (sodium bentonite $2–$5)$3–$10
WCP Building Renewal (July 2025)Rooftop replacement, torch-on or liquid-applied$15–$25
WCP Building RenewalBalconies, liquid polyurethane$20–$40
WCP Building RenewalPodium decks$25–$40
WCP Building RenewalParking decks, traffic-rated PU or PMMA/PUMA$35–$50
Read September 2026. WCP's replacement figures appear to reflect the Canadian market and exclude major substrate restoration. HomeGuide puts whole basement jobs at $6,000–$18,000.

The commercial rows are replacements of existing roof, balcony, podium and parking membranes, so they carry removal and traffic-grade work the residential rows don't. For a homeowner's numbers, see our basement waterproofing cost guide.

ArmorThane applicators

Spray polyurea membranes, applied by certified crews

ArmorThane-certified applicators spray ArmorThane polyurea systems on foundations, decks, roofs and tanks, with the product, prep, minimum dry mils and field tests on the quote.

If your job is a simple wall you'll backfill tomorrow, a sheet membrane may be the better buy, and a good applicator will say so. On a congested deck, a tank or a roof full of penetrations, a seamless spray membrane pays off.

Find a certified applicator →Polyurea waterproofing
Applicator in a respirator spraying a blue polyurea lining inside an industrial concrete tank
Spray polyurea lining a concrete process tank.
100% solids

Zero VOC

ArmorThane's elastomeric coating guide lists its polyurea and polyurethane systems at 100% solids and zero VOC.

300–600%

Elongation

With 2,500–4,500 psi tensile strength and Shore D 45–60, per the same guide.

3–15 s gel

Fast cure

Tack-free in 15–90 seconds; service range −40°F to +250°F.

For contractors

Add waterproofing to your spray rig.

Foundations, plaza decks, roofs and tanks need seamless membranes applied to a written thickness and tested before they're covered. ArmorThane supplies the polyurea systems, equipment and hands-on training, with no franchise fee, dealership fee or royalty.

Become a waterproofing applicatorPolyurea training
Straight answers

Liquid waterproofing membrane FAQ

What is a liquid applied waterproofing membrane?

It's a waterproofing layer made on site from a liquid that is sprayed, rolled or troweled onto concrete, masonry or a roof, then cures into one continuous rubbery film. Common families include polyurea, polyurethane, PMMA and PUMA, hot or emulsified rubberized asphalt, silicone and polymer-modified cement. With no laps or seams, it flashes itself around pipes, drains and corners.

What is the best liquid membrane waterproofing?

The best membrane is the one that fits the exposure. Below grade under backfill, look for a product that meets ASTM C836. For exposed parking and pedestrian decks, use a C957 traffic coating or PUMA. Under pavers or soil, hot rubberized asphalt or a C836 liquid. For fast return to service or cold weather, spray polyurea, PMMA and PUMA cure within minutes to about an hour.

How thick should a liquid waterproofing membrane be?

W. R. Meadows says waterproofing uses materials of 40 mils or more, while dampproofing is normally about 10 mils. Published systems range from about 59 mils for one pure polyurea (a 1.5 mm minimum) to 80 mils for a two-coat cementitious slurry and 185 to 215 mils for hot rubberized asphalt. The data sheet's minimum dry film thickness governs.

What is the difference between liquid and sheet membrane waterproofing?

Sheet membranes are factory-made rolls of uniform thickness, lapped and shingled to shed water; one 60-mil self-adhered sheet can be backfilled immediately. Liquid membranes are applied on site and cure seamless and self-flashing, so they handle drains, pipes and odd shapes well, but their thickness depends on the crew and they can be punctured on the job site.

How do you apply a waterproofing membrane?

Let new concrete cure at least 7 days (28 is optimal), prepare it to the ICRI surface profile the data sheet calls for, and confirm pH and moisture. Treat cracks, joints and penetrations first. Then spray, roll or squeegee the membrane to the specified wet film, checking with a notch gauge, and run the specified leak tests before covering it.

How do you apply a waterproofing membrane on a roof?

Clean and repair the roof, prime if the data sheet requires it, and reinforce seams, drains and penetrations before the field coat. Reinforced PMMA systems embed a polyester fleece in the resin; coatings such as silicone go on at the thickness the data sheet sets. ASTM D5957 flood testing isn't meant for roofing, so roof leaks are located with electronic leak detection (ASTM D7877).

Can you paint over a waterproofing membrane?

Only with a topcoat the membrane maker approves. Many systems are built for one: aromatic polyurea gets an aliphatic, UV-stable topcoat, and C957 traffic systems use specified top coats over the base. Ordinary paint isn't part of the tested system, so check the data sheet first. Membranes meant to be buried, such as hot rubberized asphalt, should be covered, not painted.

How long does a waterproofing membrane last?

It depends on the chemistry, thickness, prep and exposure, and manufacturers express it through warranties rather than one industry number. Henry, for example, offers up to a 12-year warranty on one acrylic roof restoration system. Buried membranes are shielded from sun and traffic; exposed ones wear, so topcoats and periodic inspection matter. Ask for the written warranty and what voids it.

How do you waterproof a basement wall from the outside?

Excavate to the footing, clean and repair the wall, and apply the membrane to the exterior (positive) side. IIBEC prefers positive-side placement because negative-side systems are susceptible to failure under hydrostatic pressure. A liquid membrane for backfilled walls should meet ASTM C836, go on at its specified thickness and be protected before backfill. Pair it with drainage at the footing.

How thick is a 215-mil hot-applied waterproofing membrane?

215 mils is 0.215 inch, about 5.5 mm. That's the fabric-reinforced build of a hot rubberized asphalt membrane such as Henry 790-11: a 90-mil layer, reinforcing fabric, then 125 mils. A single unreinforced layer averages 185 mils, with a 125-mil minimum. The material is heated to 356 to 392 degrees F and must be covered, not left exposed.

AT
ArmorThane Technical Team · Springfield, Missouri
Written from ASTM and ICRI standard summaries, IIBEC and Construction Specifier articles, manufacturer data sheets and dated 2025–2026 cost guides. Reviewed September 27, 2026.

Methodology and sources

Product figures are each maker's published claims. Conversions use 231 cubic inches per US gallon. The selector's rankings are our editorial judgment, not a design professional's specification.

  1. ASTM International: C836/C836M-18 (2018); C957/C957M-17 (2017); C1305/C1305M-16 (2016); D412-16(2021); D624-00(2020); E96/E96M-22a (2022); D4541-22 and D7234-22 (2022); D4414-95(2020); D5957-98(2021)
  2. ANSI Webstore: ASTM C1305/C1305M-25 (2025), D4787-24 and D7877-24 (2024)
  3. Matest Labs, ASTM C1305 test description (July 9, 2026)
  4. ICRI, 310.2R-2013; DeFelsko, ICRI Concrete Surface Profile Chips
  5. Sherwin-Williams Protective and Marine, Concrete Surface Preparation for Water and Wastewater
  6. KTA-Tator, Testing for Moisture Content in Concrete (Nov. 2024)
  7. Polyurea Development Association, PDA brochure (2002)
  8. VersaFlex, FSS 50DM+ Aromatic; Tecnopol, Tecnocoat P-2049 page and TDS (2018)
  9. Tremco: TREMproof 250GC (Dec. 2025), TREMproof 260 (Nov. 2023), Vulkem 360NF+/346/346 (Apr. 2025) data sheets
  10. Siplast, Parapro Roof Membrane Resin data sheet (May 2026)
  11. Henry (Carlisle): Pumadeq, 789, Blueskin WP200, Pro-Grade 988 and Pro-Grade 280 pages; 790-11 product data (Jan. 10, 2024)
  12. Sika USA, SikaTop Seal 107 product data sheet (Nov. 20, 2015)
  13. The Construction Specifier, The Evolution of Fluid-Applied Membranes (Oct. 1, 2020)
  14. IIBEC, Stewart and DuPont, Below-Grade Waterproofing Selection and Design Consideration (Mar. 27, 2009)
  15. W. R. Meadows, Waterproofing vs Damp-Proofing (July 14, 2023)
  16. HomeGuide (Jan. 23, 2026), Angi (July 20, 2026) and Fixr (Feb. 6, 2026), basement waterproofing cost guides
  17. WCP Building Renewal, Cost per Square Foot to Replace a Waterproofing Membrane (July 4, 2025)
  18. ArmorThane, Elastomeric Coating Guide (Apr. 2026)
Waterproofing Newsletter

Waterproofing guides for owners and specifiers.

Membrane comparisons, test methods and project examples from the people who make ArmorThane polyurea.

  • New waterproofing guides and specs
  • Project case studies and details
  • Applicator and product news
Need a price on a project now? Get a free quote or call (417) 831-5090.
Which applications interest you?
Pick all that apply. We only send you what fits.
Optional. Helps us point you to applicators near you.

latest news & bLOGS

Learn more

Seamless is the promise. Testing is the proof.

A liquid membrane is only as good as its prep, its thickness and its pinhole count. ArmorThane-certified applicators spray polyurea membranes on foundations, decks, roofs and tanks. Contractors: we make the material and train your crew, with no franchise fee, royalty or dealership fee.

Find a waterproofing applicator →Become a waterproofing applicator
United States 417-831-5090 · Canada 780-444-6200

CONTACT US

REQUEST A QUOTE OR

BECOME AN APPLICATOR

ArmorThane has built a strong reputation over the past 30 years for producing high-quality, durable protective coatings.

group 115 660555abebfe4
Phone Number

Tel: 417.831.5090

group 115 1 660556c21395c
Email Us

moreinfo@armorthane.com

Step 1 of 3

We want to help you find the best ArmorThane applicator for your protective coating project. Please either fill out the request form below or call us toll free at 417-831-5090, any time Monday-Friday, 8:00 a.m. to 5:00 p.m. Central Standard Time.

RV Find An Applicator

Step 1 of 3

Connect with an authorized ArmorThane professional to get a long-lasting, seamless protective coating for your RV. Submit the form below or call us directly at 417-831-5090 (Monday–Friday, 8:00 AM – 5:00 PM CST).

Facebook Twitter Youtube

Find An Applicator

Applicator Login

Armorthane Logo Outlined
CALL NOW
BECOME APPLICATOR
FIND APPLICATOR

Protective Coating Applications

Products

Applicator Opportunities

Knowledge Center

Galleries