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ARMORTHANE PROTECTING YOUR WORLD

PROTECTING YOUR WORLD

ARMORTHANE PROTECTING YOUR WORLD

Polyurea Liners:
Spray-On Liners for
Ponds, Pits & Tanks

How spray-on polyurea liners work, polyurea over geotextile vs sheet liners like HDPE, EPDM and PVC, and where a seamless polyurea liner is worth it.
Polyurea Liner Quotes

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  • What it will contain
  • Size and shape
  • Concrete, steel or soil
  • Location and access
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0 seams
Seams in a sprayed polyurea liner
Spray polyurea
Geotextile
Reinforced liner over prepared soil
Industry practice
Seconds
Gel time: builds on slopes and walls
Product data sheets
Hours
Typical time to return to service
Product data sheets

A polyurea liner is a containment membrane that is sprayed in place instead of rolled out and seamed. It bonds to concrete, steel, wood or a geotextile fabric laid over soil, and cures in seconds into a seamless, puncture-resistant skin. That makes it a strong alternative to sheet liners wherever seams, odd shapes, penetrations or abuse are a problem: ponds, pits, containment, tanks, trenches and truck beds.

Quick answer

A polyurea liner is a spray-applied, seamless elastomeric membrane used to contain water, chemicals, fuel or waste. It can be sprayed directly onto concrete and steel or onto a nonwoven geotextile placed over prepared soil to form a reinforced geomembrane. Compared with HDPE, EPDM or PVC sheet liners, it has no seams, conforms to any shape and resists puncture and abrasion, but costs more per square foot on simple, large, flat areas.

What's in this guide
  1. 1Uses
  2. 2Polyurea vs sheet liners
  3. 3Over geotextile
  4. 4When to choose
  5. 5FAQ
Start here

Where polyurea liners are used

Water

Ponds and water features

Koi ponds, farm ponds and decorative water. See pond liner and koi pond liner.

Containment

Pits and secondary containment

Frac pits, sumps, bund walls and berms. See our secondary containment guide.

Tanks

Tank linings

Steel and concrete tanks. See tank lining and fuel tank liner.

Livestock

Stock tanks and troughs

See stock tank liner.

Vehicles

Truck bedliners

The best-known polyurea liner. See spray-on bedliners.

Industrial

Trenches and channels

Chemical trenches, canals and spillways.

Compare

Polyurea vs sheet liners

FactorSpray polyureaHDPEEPDM / PVC
SeamsNoneWelded seamsTaped or welded seams
Odd shapes and penetrationsEasy, sprays around themDifficultModerate
Puncture and abrasionExcellentGoodFair
Bond to substrateFully bondedLoose laidLoose laid
RepairsSpray patchWeld patchGlue or tape patch
Cost on large simple areasHigherLowerLower
EquipmentPlural-component rigWelding equipmentBasic tools
Typical comparison; project specs govern.
On soil

Polyurea over geotextile

  1. Grade and compact

    Shape the excavation, remove rocks and roots, and compact the subgrade.

  2. Lay geotextile

    Place nonwoven geotextile with overlaps and anchor it in trenches.

  3. Spray

    Spray polyurea in multiple passes to the specified thickness, sealing overlaps and anchors.

  4. Detail

    Seal pipes, penetrations and transitions to concrete.

  5. Test

    Check thickness and inspect for pinholes before filling.

Field noteThe geotextile weight and polyurea thickness should match the use. Livestock, equipment traffic and rock subgrades need heavier fabric and more mils.
Choose

When to pick a polyurea liner

Best fit

Complex shapes

Many corners, steps, pipes and penetrations.

Best fit

Abuse

Livestock, equipment, debris and foot traffic.

Best fit

Bonded containment

Concrete and steel structures that must not leak behind the liner.

Compare

Huge flat areas

Large simple ponds may cost less with sheet liners.

Ready to price it? See polyurea cost.

Polyurea liners

One seamless liner, no seams to fail.

A certified ArmorThane applicator can line your pond, pit, tank or containment area with spray polyurea.

Get a free quoteFind an applicator

Contractors: become an ArmorThane applicator

FAQ

Polyurea liner questions

What is a polyurea liner?

A spray-applied, seamless elastomeric membrane used to contain water, chemicals, fuel or waste, applied to concrete, steel or geotextile over soil.

Is polyurea better than an HDPE liner?

Polyurea is seamless, fully bonded and handles complex shapes, penetrations and abuse better. HDPE usually costs less on large, simple, flat areas.

Can polyurea be sprayed on dirt?

Not directly. It is sprayed onto nonwoven geotextile fabric laid over prepared, compacted soil.

How long does a polyurea liner last?

Properly applied polyurea liners commonly last decades, depending on thickness, UV exposure, chemicals and abuse.

Is a polyurea pond liner safe for fish?

Use a fully cured product suitable for aquatic use and follow the manufacturer cure time before adding fish or plants.

AT
Written by the ArmorThane technical team. We have manufactured polyurea, polyurethane and polyaspartic coatings, spray foam and plural-component spray equipment in Springfield, Missouri since 1989. Containment for regulated materials must follow applicable regulations and engineering specifications.

Sources

  1. Geosynthetic Institute resources. geosynthetic-institute.org
  2. Polyurea Development Association resources. pda-online.org
  3. U.S. EPA, Spill Prevention, Control, and Countermeasure (SPCC) rule. epa.gov/oil-spills-prevention-and-preparedness-regulations

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