What Is Simiron Polyurea?

The chemistry half

Polyurea, defined like a neighbor would

Polyurea is a resin chemistry, not a brand: it cures fast, stays slightly flexible after it sets, and tolerates moisture during cure — meaning vapor in the slab won't stop it from bonding. Those three traits read like a spec sheet until you map them onto a real slab. Fast cure means the crew recoats the same day instead of coming back tomorrow. Slight flex means the film survives a slab that swells and shrinks with the seasons on our clay. Moisture tolerance means a spring install doesn't gamble on what the concrete's doing underneath.

Epoxy — the resin it replaced as the base coat of choice — loses on all three, and that head-to-head has its own page: polyurea vs epoxy.

Simiron's polyurea base goes down at 10–12 mils {{TODO:verify-spec}} and is ready to recoat in about 1–2 hours, which is the spec that makes a one-day install possible.

The manufacturer half

Who Simiron is, and why one manufacturer

Simiron is a US coatings manufacturer, and its polyurea is the base coat on every residential floor we install. It's the named base coat of the system we install — on the quote, not behind a vague line like "commercial-grade resin."

We standardized on one manufacturer on purpose: the crew knows exactly how this product behaves in August humidity and in a 45-degree January garage. Resins are temperamental; the same bucket behaves differently at 95 degrees and thick humidity than it does in a cold garage in January, and the only way a crew learns those moods is repetition with one product. Installers who swap brands every quarter to chase price are re-learning that curve on someone's floor. We'd rather it not be yours.

To be straight about it: other good manufacturers exist. Standardizing isn't a claim that Simiron is the only answer — it's a claim that knowing your materials cold beats sampling the catalog.

Where it sits in the stack

One layer of three

The polyurea never sees daylight. Above it goes a full broadcast of vinyl flake — covered in what are Torginol flakes — and a UV-stable polyaspartic topcoat that takes the scratches, sun, and tires. The base coat just does the one thing nothing else in the stack can do: hold the whole assembly onto concrete that's alive underneath it.

It's the least photogenic layer on the floor and the only one a warranty genuinely depends on.