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Tell us what the surface sees and how often. We will connect you with a certified applicator who can match the coating to the chemical.
"Chemical resistant" on a can means very little until you know which chemical, how strong, how hot and for how long. A coating that shrugs off diesel drips can soften under hot caustic washdown, and one that survives sulfuric acid splash may fail in constant immersion. This guide explains how the main chemistries compare and how to specify one with the exposure spelled out, from a team that manufactures polyurea, polyurethane and hybrid coatings.
A chemical resistant coating is a protective lining chosen to resist a specific chemical at a specific concentration and temperature. For most acids, caustics and fuels in containment, sumps and floors, novolac epoxy and vinyl ester give the highest chemical resistance, while polyurea and polyurea hybrids give a thick, flexible, crack-bridging membrane that handles splash, spills and secondary containment with fast return to service. Always check the manufacturer chemical resistance chart for the exact chemical, and decide up front whether the service is splash, spill or immersion.
Chemicals attack coatings in three ways: they dissolve or soften the resin, they permeate through the film and attack the substrate underneath, or they react with the coating and break it down. Dense, highly cross-linked films resist all three better, which is why novolac epoxies and vinyl esters top most resistance charts. Elastomers like polyurea trade a little chemical resistance for toughness, elongation and the ability to bridge cracks.
Acids, caustics, solvents, fuels and oxidizers each attack resins differently. Name the actual product, not just "acid."
10% sulfuric acid and 98% sulfuric acid are different services. Many coatings resist one and not the other.
Resistance drops as temperature rises. A rating at 75°F says nothing about hot washdown or process spills.
Splash cleaned up in hours is much easier than spills that sit for days or constant immersion.
Steel, concrete and old coatings need different primers and prep. Concrete adds moisture and cracking to the list.
Hot water, caustic cleaners and pressure washing can be harder on a coating than the process chemical.
Dikes and berms around tanks need a seamless, crack-bridging liner that holds a spill until cleanup. See secondary containment.
Forklift traffic plus drips and spills. Choose for abrasion and chemistry together.
Chemicals collect and sit here, so treat them as near-immersion service.
Hydrogen sulfide turns to sulfuric acid on concrete crowns. See wastewater coatings.
Immersion service needs a lining rated for that chemical and temperature. See tank lining.
Diesel, gasoline and oils on concrete. See fuel tank liner.
Product name, concentration and safety data sheet for each chemical, including cleaners and wash-down agents.
Splash, spill (how long before cleanup), or immersion, plus the highest temperature it will see.
Confirm each chemical against the manufacturer chemical resistance chart at your temperature.
Abrasive blast steel to the specified standard; shot blast or grind concrete and test moisture. See surface preparation.
Primer, body coat and topcoat, with minimum dry film thickness for each.
Holiday test linings, check thickness and adhesion, and keep the records.
Spray polyurea is 100% solids and gels in seconds, so an applicator can build a thick, seamless membrane on walls, floors and dikes in one visit. It stays flexible, so it bridges shrinkage cracks that would crack a rigid lining. It is a strong choice for secondary containment, spill zones and wastewater structures. It is not the answer to every chemical: strong solvents, hot concentrated acids and some oxidizers call for novolac epoxy, vinyl ester or a specialty lining.
See our chemical coating products and the industrial coatings guide.
A certified ArmorThane applicator can review your chemical list and exposure and quote a system with prep, thickness and testing spelled out.
Contractors: become an ArmorThane applicator
For strong acids and solvents, novolac epoxies and vinyl esters are usually the most chemical resistant coatings. The right answer depends on the exact chemical, concentration and temperature, so check the resistance chart.
Polyurea resists water, many dilute acids and caustics, fuels and oils, which suits secondary containment and spill areas. Some strong solvents and hot concentrated acids need a different system. Check the product chart for each chemical.
Standard epoxy resists many mild chemicals, oils and fuels. Novolac epoxy is the upgrade for stronger acids, solvents and higher temperatures.
Splash means occasional contact that is cleaned up quickly. Immersion means the coating sits in the chemical continuously. Many coatings rated for splash are not rated for immersion.
With the right chemistry, proper prep and the specified thickness, linings commonly last many years. Most early failures trace back to the wrong system for the exposure, poor prep or thin film.
Owners get a certified ArmorThane applicator and a system matched to their chemicals. Contractors can add polyurea with our equipment and training, with no franchise fee and no royalties.
ArmorThane has built a strong reputation over the past 30 years for producing high-quality, durable protective coatings.
Tel: 417.831.5090
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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.
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).
