Polyurea & Polyaspartic Coating FAQs

Polyurea is an elastomeric polymer formed when an isocyanate component reacts with an amine-terminated resin blend. The reaction is extremely fast and does not need a catalyst, solvent or heat cure — the two parts meet at the spray gun tip and the film is gelled within seconds. The result is a seamless, flexible, chemically resistant membrane rather than a rigid plastic shell. On concrete it is used as a floor system, a waterproofing membrane, a containment lining and a spray-in truck bed liner, all from the same chemistry family with different formulations.

Polyaspartic is a subclass of polyurea, not a competing material. It is made with an aspartic ester resin instead of a standard amine, which slows the reaction from seconds to a workable pot life of roughly twenty to forty minutes. That controllability is why polyaspartic is almost always the topcoat and pure polyurea is the basecoat or the high-build lining. Polyaspartics are also aliphatic, meaning they hold their color under ultraviolet light, which is exactly why they finish every exterior surface we install in Arizona.

It costs more than epoxy per square foot, sometimes considerably. Its cure speed leaves almost no margin for error — a mistake in the film cannot be brushed out thirty seconds later. It demands heated, plural-component spray equipment and a trained applicator, so the installer matters more than the product. Aromatic polyurea formulations chalk and shift color badly under direct sun unless finished with an aliphatic topcoat. And it will not bond to a poorly prepared surface, so a bad prep job wastes an expensive material.

During application, the isocyanate side is a respiratory sensitizer, and the spray operation produces aerosol that requires supplied-air respirators, protective suits and controlled ventilation. That is a genuine occupational hazard and the main reason this is professional-only work. Once the coating has fully reacted and cured, it is inert: no ongoing off-gassing, no solvent smell, safe for pets, food-service floors and living spaces. The risk window is the install itself, which is why we set containment and control site access while the rig is running.

Silicone, most polyolefin plastics such as polyethylene and polypropylene, PTFE, and anything with a release agent or mold-release residue on it. It also will not bond to oil-saturated concrete, an intact sealer, loose laitance, a chalking existing coating, or a slab actively pushing moisture vapor from below. Almost all real-world adhesion failures are surface problems rather than material problems — the coating bonded perfectly to a contaminated layer that was never bonded to the concrete underneath it.

Honestly, no — not true polyurea. It requires a plural-component proportioner that heats both components to roughly 150°F, holds them at 2,000 psi or more, and meters them at a precise ratio through an impingement-mix gun. That equipment is a serious capital investment and takes real training to run. Gel time is measured in seconds, so there is no opportunity to correct a run or a holiday. The consumer products sold as polyurea in big-box stores are typically thin single-component hybrids and are not the same material.

For most residential garages, yes. Grinding and vacuum runs through the morning, then crack chase and patch, then the base application, then flake broadcast to refusal, then a scrape and vacuum before the polyaspartic topcoat in the afternoon. Foot traffic is usually fine that evening and vehicles the next day. What breaks the single-day schedule is discovering serious slab problems: heavy moisture, extensive spall repair, or a failed coating that has to be fully removed. Those become two-day jobs and we tell you before we start.

We diamond grind, without exception, to a CSP 2–3 profile, or shot blast for heavier industrial builds. Acid etching is the single most common cause of coating failure on residential floors: it leaves an inconsistent profile, it can drive salts into the surface, and neutralizing it properly is rarely done well in the field. If a bidder tells you etching is equivalent to mechanical profiling, that is the moment to end the conversation, whatever the price is.

Sometimes, and only after testing. If the existing coating is well bonded, passes an adhesion pull test and can be mechanically abraded to a sound profile, recoating is legitimate and saves you removal cost. If it is delaminating, blushing, chalking, or was installed over an acid-etched slab, it has to come off entirely — otherwise your new system is only as strong as the failed layer holding it up. We test rather than guess, and we tell you which situation you are in.

No, but it changes how we work. Slab temperature drives cure speed, so a 130°F garage floor at 2 p.m. shortens working time to a point where quality suffers. We start early, work shaded or interior spaces during peak heat, monitor slab temperature rather than air temperature, and watch dew point in monsoon season because applying over a slab below dew point traps moisture at the bond line. Summer installs are routine here; they are just scheduled around physics instead of convenience.

A polyurea basecoat with a full broadcast of decorative flake and an aliphatic polyaspartic topcoat, over a diamond-ground slab. That combination gives you heat tolerance well past what a Phoenix garage reaches in August, flexibility over slab movement, a texture that hides dust and tire marks, and a color that does not amber. Single-coat products, big-box kits and thin two-coat epoxies all fail in this climate for predictable reasons, and most of our residential work is the second coating on a floor.

For an existing concrete deck, a textured polyaspartic system with a light-colored aggregate broadcast is usually the strongest option: it is barefoot-tolerant because the light color reflects heat, it is genuinely slip-resistant when wet, it is seamless so there are no joints to trap algae, and it holds color under constant UV. Pavers and travertine are beautiful and stay cool, but they cost more and have joints. Traditional acrylic cool-deck is cheaper and does chip, crack and require refinishing sooner.

Usually not. Hairline shrinkage cracks and most map cracking are cosmetic and get chased out to a V, filled with a polyurea repair compound, and ground flush before coating. What a coating cannot fix is a structurally active crack caused by settlement, heaving or a failed subgrade — that will move again and eventually telegraph through any membrane. We tell you honestly which kind you have during the site visit, because coating over a structural problem just delays it.

Dust mop or blow it out, then damp mop with a pH-neutral cleaner. Avoid anything with citrus, ammonia, bleach or a degreaser strong enough to dull the finish, and skip so-called mop-and-shine products entirely — they leave a film that is harder to remove than the dirt was. Do not leave rubber mats or tires parked on the same spot indefinitely on a hot floor, because plasticizer from the rubber can migrate and stain. That is genuinely the entire maintenance program.