A buyer’s field guide to polyurea materials, primers, topcoats and the equipment that sprays them — what each piece does and what to check before you spend money.
The default spray membrane: tough, fast, economical. Specified for bedliners, containment, waterproofing and linings.
Ask for: gel time, tensile, elongation, tear and hardness on the TDS — and whether it’s truly pure or a hybrid.
Ask applicatorsUV-stable color and gloss over aromatic base coats. Essential where looks matter outdoors.
Check recoat window over the base coat so the layers bond chemically.
Ask applicatorsAmine/polyol blend that’s cheaper and forgiving. Common for bedliners and general protective work.
Avoid for aggressive chemical or immersion service unless the spec allows it.
Ask applicatorsSlower aliphatic polyurea you roll or squeegee — the go-to garage and flake-floor topcoat.
Watch pot life in hot weather; mix small batches.
Ask applicatorsEpoxy, urethane and moisture-tolerant primers for concrete; metal primers for steel. They fight outgassing and lock in adhesion.
Match the primer to substrate moisture and the topcoat manufacturer’s approved list.
Ask applicatorsSemi-rigid polyurea joint fillers and detail compounds for control joints, coves and penetrations.
Treat moving joints differently from static cracks.
Ask applicatorsFabric embedded in or under the membrane for earthen containment, ponds and roofs.
Fully encapsulate the fabric — exposed fibers wick water.
Ask applicatorsPigment packs, broadcast aggregates and flake for grip and looks.
Pigments settle — keep the B-side agitated.
Ask applicatorsElectric, air or hydraulic units that heat both sides and pump them on ratio at high pressure. The heart of the rig.
Size output to your jobs and confirm local service and parts availability.
Ask applicatorsAir-purge or mechanical-purge guns that mix A and B in a small chamber. Chamber size sets output and pattern.
Keep spare side seals, check valves and a cleaning kit on the truck.
Ask applicatorsInsulated hose with heat tracing to hold temperature from the reactor to the gun.
Long runs lose temperature and pressure — plan hose length for the jobs you do.
Ask applicatorsFeed pumps move material from drums to the proportioner; agitators keep the B-side mixed.
Use a desiccant dryer on the A-side drum — moisture crystallizes isocyanate.
Ask applicatorsTrailer or box-truck builds with the reactor, generator, air, drum heat and storage in one place.
Climate control the material — cold drums spray badly.
Ask applicatorsClean power for heaters and pumps, and clean, dry air for purge guns and supplied-air respirators.
Undersized generators cause heat and pressure problems that look like material issues.
Ask applicatorsDry film thickness gauges, adhesion pull-off testers, moisture meters and dew point / surface temp meters.
Document readings — it settles warranty arguments.
Ask applicatorsSupplied-air respirators, disposable coveralls, chemical-resistant gloves and eye protection.
Follow the SDS and your local regulations for every helper on site.
Ask applicatorsTap a line. Values below are illustrative examples, not any specific product.
The proportioner must hold this. A few percent off can leave soft, sticky or brittle material — check it with our ratio tool.
Whether you’re choosing a material or a whole rig, these questions save expensive mistakes.
Manufacturing polyurea and polyurethane protective coatings in Springfield, Missouri since 1989 — with systems for bedliners, floors, roofs, containment and industrial work, plus training and equipment packages for new and growing applicators.
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