Four coats over prepared concrete
A hardware-store garage kit is one coat of floor paint. This is a built system, and each layer does a job the layer above it depends on.
- Clear protective topcoat Anvil Coat ClearTop Takes the abrasion so the flake never does. The wear surface. Everything that happens to the floor — tires, tools, road salt, a dropped socket — happens to this layer, which is why it is the one that can be re-coated without touching anything beneath it. Polyaspartic rather than epoxy: it stays clear under UV where an epoxy ambers, and it cures in a cold garage. Duromar The clear coat used to seal decorative broadcast floors in food and beverage plants, where a floor has to be hard-wearing and cleanable at the same time.
- Full broadcast flake Anvil Decorative Flake Broadcast to refusal, then scraped flat. Texture, depth and slip resistance. Broadcast into the wet body coat until the surface will not accept any more — that is what "full broadcast" means, and it is the difference between a floor with flake in it and a floor with flake scattered on it. The excess is swept off once cured and the surface scraped flat before the clear goes down. A full broadcast cannot be sold unsealed. Loose flake has to be encapsulated by the clear coat above it, which is a rule of the system rather than an upsell.
- Pigmented body coat Anvil Coat-AE The body of the system, and what holds the flake. 100% solids, and the layer the flake is thrown into while it is still wet. Aspartic ester rather than epoxy here because it returns to service fast, which is worth more to somebody doing their own garage over a weekend than the few dollars a standard epoxy saves. Two other body coats are offered if that trade looks different to you. Duromar Specified for decorative broadcast floors in plants that cannot afford to be shut for a week — the same property that gets a garage back into use the same weekend.
- Primer Anvil Prime Penetrates the slab and creates the bond everything above relies on. A surface-tolerant primer that soaks into prepared concrete and seals it before the body coat goes down. Tolerant of the oil and grease a real garage slab has in it, which is not something most primers can say, and this is the layer that decides whether the floor stays attached. Duromar Built to prime concrete that has been in industrial service, where a slab has years of oil in it and taking it back to clean concrete is not an option.
- Prepared concrete Diamond ground to profile. This is the step people skip. The slab has to be opened up so the primer can key into it. Cleaned to ASTM D 4258, then profiled to ASTM D 4259 until it has the texture of 60–80 grit sandpaper. A coating over a sealed or polished slab is a coating that peels.
The build, in the order the manufacturer specifies it
This is the system as the manufacturer specifies it. The one deviation ANVIL makes is at step four, and it is called out where it happens.
- Prepare the concrete. Abrasive blasting, shot blasting or grinding. Acid etching is acceptable only in some cases, and worth asking us about first. What that actually involves.
- Anvil Prime at 5 mil nominal, one coat, left at least four hours before the base coat. It is a low-viscosity saturant, so it soaks into the profiled surface and strengthens it rather than sitting on top. It is not moisture tolerant: the slab has to be dry, no wetter than 4%, and that has to be tested rather than assumed.
- Mix the base coat. Part A and Part B are premixed separately, then combined at 2:1 by volume, 2.4:1 by weight and mixed for two to three minutes with a Jiffy mixer.
- Apply Anvil Coat-AE and broadcast into it wet, to refusal — until the surface will not accept another flake. The clear topcoat’s data sheet names this exact application — a vinyl chip or colored quartz broadcast.
- Let it cure firm, then sweep, grind and patch. The loose flake comes off, the surface is scraped flat and any defect is made good before anything clear goes down.
- Topcoat at 12 mil nominal, applied by squeegee and back-rolled. If you are putting on a second coat, the window is 6–12 hours — and the maximum is a real deadline, not a guideline. Past it the surface has to be abraded before it will take another coat.
- Wait 5 days before parking on it. The topcoat takes foot traffic well before that, but full service is the number that matters if a car is going back in.
Why four coats and not one
A one-coat garage paint asks a single film to do four different jobs: bond to concrete, build thickness, provide color, and survive being driven on. Those jobs want different properties, and a single film ends up mediocre at all of them.
Splitting them lets each layer be good at one thing. The primer is chosen for adhesion and for soaking into the slab, and nothing else. The base coat is chosen for strength and chemical resistance — it is the body of the system, and it never has to be pretty because it is buried. The flake carries the appearance and the texture. The clear takes all of the abrasion, which is what makes the floor renewable: when the wear surface eventually dulls, it is the clear that gets re-coated, not the floor that gets ground off.
Where the ANVIL build differs from the data sheet
One place, and it turns out not to be a substitution at all. The clear topcoat’s own data sheet describes it as “often used over quartz or vinyl chip broadcast to create durable, decorative floors”, and again as a top coat “for vinyl chip or colored quartz systems”. Both media ANVIL sells are named by the manufacturer, in the application ANVIL sells them for.
That is a stronger position than the one this page used to take. It previously said the coating was specified and the decorative media was our own substitution, carried over from a different manufacturer’s sheet for a product that is not in this system — one that broadcasts 20/40 mesh silica sand for an industrial non-slip finish. That sheet describes a different floor. Ours names chip and quartz directly.
What remains genuinely unspecified is narrower, and we still say so: the manufacturer names the media but does not publish a chip size or a broadcast rate, because those are the installer’s decision rather than the coating’s. Ours are fixed by the kit: Quarter inch, 0.2 lb per sq ft, broadcast to refusal.
What the timings mean on the day
| Anvil Prime | Anvil Coat-AE | Anvil Coat ClearTop | |
|---|---|---|---|
| Mix ratio | 2:1 by volume | 2:1 by volume | 2:1 by volume |
| Working time once mixed | 40 min | 20–30 min | 20 min |
| Before the next coat | 4 hr minimum | — | 6 hr minimum |
| Before it must be abraded | 14 days | 72 hr | 12 hr |
| Light foot traffic | — | 6 hr | 10 hr |
| Full service | — | 7 days | 5 days |
| Coldest it will cure | 50°F | 50°F | 15°F |
The topcoat has a twelve-hour ceiling, and it is the only step in this build that waiting cannot fix. If you are laying two coats of clear, the second goes on between six and twelve hours after the first. Past twelve, the surface has to be mechanically abraded before it will take another coat. Plan the clear for a morning rather than an evening.
The base coat’s 20 minutes is the number that shapes the whole day. It is not a working window you can stretch by going carefully — it is how long the chemistry takes to become unusable in the pail. That is why the flake goes down while the base is still wet, why the material is mixed in batches rather than all at once, and why the broadcast is the step people ask us about most. Everything that needs doing must be within reach before the two parts meet.
Every one of those figures is quoted at 70°F. A garage that is colder cures slower, and pot life in a hot garage is shorter than the sheet says, not longer. The sheet does give an application window: 55°F and above, air at least 5°F above the dew point. That dew point condition is the one people skip, and it is what causes pinholes — a slab whose temperature is falling towards the dew point outgasses into wet coating.
How much material a floor takes
Every layer in this build is 100% by weight solids, which means nothing evaporates out of it. The gallon you spread is the film you keep, and coverage is arithmetic rather than a guess: 1604 ÷ mils gives square feet per gallon. At the body coat’s specified build that is 100 sq ft per gallon at 16 mil.
Duromar caveats the formula, and the caveat is the reason kits carry overage: coverage is affected by the condition and type of substrate and by the ability of the applicator to hold a consistent thickness. A rough or porous slab drinks more. Size your floor.
See it in your own garage
The system is the same whichever blend you pick. Choose the one you want to look at.