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The short answer
Gorilla's 12-piece kit is the best epoxy buy for most garages: 2-part 100% solids so the film you apply is the film you keep, 550 sq ft of published coverage, and driveable in 24 hours. Step up to ArmorPoxy's 17-piece if you want a three-layer flake system with a non-slip additive included, or Spartan's if you want the urethane topcoat that makes a flake floor last.
A genuine three-layer flake system with the non-slip additive included. Expensive per square foot, and the only kit here that treats slip resistance as standard.
Three gallons of zero-VOC 100% solids for maximum film build, sold as material only. The 250-600 sq ft coverage range means you test your slab before you order.
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Solids content is the first fork
Every epoxy kit here is either water-based or 100% solids, and the difference is film thickness — which on a garage floor is durability.
Water-based (Rust-Oleum EpoxyShield): the water carries the epoxy and then leaves. The dried film is thinner than what you rolled on. Cheapest, most forgiving, three days to vehicle traffic.
100% solids (Gorilla, ArmorPoxy, Simiron, Spartan, McKinnon): nothing leaves. The film you apply is the film you keep. ArmorPoxy puts a number on it — 5-6 times the thickness of standard floor paint. Faster cure, far less forgiving to apply.
For a floor that takes hot tires, dropped sockets and a jack stand, thickness is the thing. For a floor you want to look tidy, water-based is enough.
Pot life: the spec nobody prints in big letters
A 100% solids epoxy has a short working window. Mix it and the clock is running — you are rolling continuously until it is down, with no pausing to answer the door.
Only one product on this site publishes a working time in minutes, and it is a polyaspartic: POURLA states 30-50 minutes. The epoxies here publish cure times but not pot life, which is the figure that determines how the afternoon actually goes.
Practical response: plan the floor in sections before you mix, have the roller loaded and the flake to hand, and get a second person. The water-based kits are far more relaxed about this, which is a real reason to choose one for a first attempt.
What is in the box
Kit
Pieces
Coverage
Etch
Flake
Non-slip
Topcoat
Gorilla 12-pc
12
550 sq ft
In kit
In kit
No
No
ArmorPoxy 17-pc
17
300 sq ft
Yes
Yes + extra bags
Yes
No
Spartan flake kit
Multi
300-400 sq ft
Not stated
Yes
No
2-part urethane
EpoxyShield 2.5-car
Kit
2.5-car
Yes
Yes
No
No
Simiron 1100SL 3 gal
Material
200-350 sq ft
No
No
No
No (basecoat)
ArmorPoxy 3 gal
Material
250-600 sq ft
No
No
No
No
McKinnon 1 gal
Material
Not published
No
No
No
No
Scroll the table sideways on a narrow screen.
Two kits deserve specific credit. ArmorPoxy's 17-piece is the only one with a non-slip additive — on a glossy floor in a wet climate that is a safety item. Spartan's is the only one with a 2-part urethane topcoat, which is what makes a flake floor survive traffic rather than wearing through the flake.
At the other end, Simiron, ArmorPoxy's 3-gallon and McKinnon are material only. Fine if you own tools and buy prep separately; a surprise if you expected a kit.
The three-layer idea
ArmorPoxy and Spartan both sell three-layer systems, which is how professional floors are actually built: a basecoat, a flake broadcast, and a clear topcoat.
Why it matters: the flake sits in the basecoat and the topcoat buries it. Without the topcoat, the flake edges are exposed and traffic wears them off. With it, the wear surface is clear resin and the flake is protected underneath.
Spartan includes the urethane topcoat; ArmorPoxy's 17-piece does not, so pair it with a polyaspartic topcoat if you want the full system. Three layers also means three working sessions and three cure windows, which is a genuine weekend-and-a-half.
Sizing: match the kit to the bay
The per-square-foot arithmetic strongly favors the bigger kits. Gorilla's 7-piece covers 275 sq ft and costs almost as much as the 12-piece, which covers 550 sq ft. Unless you genuinely only have one bay, buy the larger.
And read the coverage ranges honestly. ArmorPoxy's 250-600 sq ft from three gallons is a 2.4x spread driven by slab porosity — which is a genuinely honest way to publish it, and means you cannot order confidently without testing your slab. Pour water on a patch: fast absorption means porous, means the low end of the range.
A genuine three-layer flake system with the non-slip additive included. Expensive per square foot, and the only kit here that treats slip resistance as standard.
A proper high-build basecoat that names its chemistry and the problems it solves. Buy it as half of a system, not as a finished floor.
What the maker publishes
Covers 200-350 sq ft per 3-gallon kit, depending on porosity and desired thickness
Cycloaliphatic formulation; solvent-free
Stated to reduce water spotting and amine blushing
Designed as a high-build basecoat over sealed concrete
Multiple cure speeds and colors available
How it scores
Durability
9.0
Coverage
5.5
Spec transparency
9.0
DIY friendliness
5.5
Value
7.5
Where it wins
+Names the actual chemistry (cycloaliphatic) and the specific failure modes it addresses — amine blush is the chalky haze that ruins epoxy floors in humid weather
+Sold as a basecoat within a system, so it is designed to be topcoated rather than left bare
+Cure-speed options let you match the product to your garage's temperature
+Works over existing sealed concrete and over previous epoxy
Where it doesn’t
−200-350 sq ft from three gallons is low coverage, because the product is designed to go on thick
−Needs a topcoat to be a finished floor, so budget for two products
−Sold as a trade material: the listing assumes you know what a basecoat is for
Three gallons of zero-VOC 100% solids for maximum film build, sold as material only. The 250-600 sq ft coverage range means you test your slab before you order.
What the maker publishes
100% solids epoxy resin, 3-layer coating system
Stated 5-6 times thicker than standard floor paint
Zero VOC emissions
Coverage 250-600 sq ft depending on floor porosity and application
How it scores
Durability
9.5
Coverage
7.0
Completeness
5.0
DIY friendliness
5.5
Value
7.0
Where it wins
+Zero VOC, not low VOC — materially different if you are working in a closed garage in winter
+Publishes a coverage RANGE tied to porosity, which is the honest way to state coverage
+5-6x the thickness of floor paint is a specific, checkable multiple
+Three gallons gives you the material to build a genuinely thick film
Where it doesn’t
−A 250-600 sq ft range is a 2.4x spread — you cannot order confidently without testing your slab's porosity first
−No tools or etch included at this price, unlike the 17-piece kit
#ad · Price as of October 5, 2026 · Affiliate disclosure for the link to 100% Solids Epoxy, 1 Gallon
#9Best for topping up or small areas
McKinnon Materials 100% Solids Epoxy, 1 Gallon
6.5/10our score, from published specs
Cheap 100%-solids epoxy by the gallon, with the thinnest spec sheet in the category. Fine as a top-up; a poor basis for planning a whole floor.
What the maker publishes
100% solids, zero VOC
Stated resistance to cracking, chipping and hot-tire pick-up
1 gallon; 10 lb
How it scores
Durability
8.5
Coverage
4.0
Spec transparency
2.0
DIY friendliness
5.0
Value
8.5
Where it wins
+The cheapest route to genuine 100% solids epoxy per gallon
+Zero VOC
+A single gallon is the right size for a landing, a step or a repair patch
+No kit extras you do not need if you already own tools
Where it doesn’t
−The listing publishes exactly one bullet point — no coverage figure, no cure time, nothing
−Material only: no etch, no tools, no flake
−Without a coverage figure you cannot calculate how many gallons your floor needs
Prep is still the thing that decides it
The best epoxy on a badly prepped slab fails; a mid-range epoxy on a properly etched slab lasts years. If you buy a material-only product, buy prep with it — the best garage floor cleaners covers the degreasers and the 3-in-1 etch.
That nothing evaporates as it cures — the film you roll on is the film you keep. Water-based epoxy loses its water content, so the dried film is thinner than what you applied. ArmorPoxy states its 100% solids system is 5-6 times thicker than standard floor paint.
How much epoxy do I need for a 2-car garage?+
A 2-car garage is roughly 400-480 sq ft. Gorilla's 12-piece covers up to 550 sq ft; ArmorPoxy's 3-gallon covers 250-600 sq ft depending on porosity. Buy at the pessimistic end of any published range — running out mid-cure is unrecoverable.
Is epoxy flake worth doing?+
It hides slab imperfections, adds grip, and it is what makes a coated floor look professional rather than painted. ArmorPoxy lets you scale the broadcast up to full coverage with extra flake bags. The catch is that a flake floor really wants a clear topcoat over it, which only Spartan's kit includes.
Why is the Spartan kit non-returnable?+
Because it ships as hazardous material, and the listing says so outright. That is a signal rather than a drawback: it is an industrial chemical system rather than a consumer paint kit. It also means measuring twice, because a wrong order is your money gone.
Do I need a non-slip additive?+
On a glossy coated floor in a wet or snowy climate, yes — a wet epoxy floor is genuinely slippery. ArmorPoxy's 17-piece kit is the only one here including one as standard. Flake broadcast also adds texture, which is part of why flake floors are the professional default.
Sources
Gorilla 12-piece kit listing — Published 2-part 100% solids, 550 sq ft from two gallons, drive on after 24 hours, hot-tire peel-up resistance.
ArmorPoxy 17-piece kit listing — Published 3-layer 100% solids system, 300 sq ft, with etching solution, flake, non-slip additive, roller and squeegee.
Spartan Epoxies flake kit listing — Published industrial-grade epoxy with flake and a 2-part urethane topcoat, 300-400 sq ft, non-returnable hazmat shipping.
