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The short answer
KILZ's 1-Part Epoxy is the honest cheap option: an epoxy-acrylic paint with 300-400 sq ft per gallon of published coverage, a satin finish that hides slab imperfections, no mixing and no pot life. It is paint rather than epoxy and KILZ says so — it even publishes what it is NOT for, which is forklift traffic and hydrostatic pressure.
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What 1-part paint actually is
KILZ calls it a 'durable epoxy acrylic formula', and that phrasing is accurate. It is an acrylic paint with epoxy esters in it, which gives better adhesion and chemical resistance than ordinary floor paint and nothing like the film build of a 2-part system.
The practical difference: a 2-part epoxy cures by chemical reaction and produces a thick, hard, bonded film. A 1-part paint dries by evaporation and produces a thin one. That is why one needs three days before you drive on it and the other does not.
What it will do, per the published claims: resist hot tire pickup, scuffing, cracking, peeling and fading. What it will not do, per the same listing: handle forklift traffic or hydrostatic pressure. That explicit NOT list is more useful than another paragraph of durability adjectives, and it is rare in this aisle.
The real arguments for it
No mixing, no pot life
This matters more than it sounds. A 100% solids epoxy gives you a short working window and no pauses — mix it and you roll until it is down. A 1-part paint waits for you. If the garage needs doing in two sessions, or the doorbell rings, or you simply do not want to work against a clock, that is a genuine advantage.
Coverage per dollar
300-400 sq ft per gallon is excellent, and it means a two-car garage is one to two gallons. Against the per-square-foot cost of any 2-part kit, floor paint is a fraction.
Satin, not gloss
Underrated. A gloss floor shows every imperfection in the slab beneath and every tire mark on top. KILZ's satin finish hides both. If your slab is a bit rough and you want it to look tidy rather than showroom, satin is the better finish regardless of chemistry.
Water-based cleanup
Soap and water, and low VOC. In a closed garage in cool weather that is a real quality-of-life difference from a solvent system.
The honest limits
Thin film. It will wear through where you walk and where a tire sits, faster than a 2-part system.
No chip or flake system. You get a color, not a finish with texture — which also means it is more slippery when wet than a flake floor.
No published cure-to-vehicle time. The listing gives coverage and surfaces but not a drive-on figure, which is the one spec the 2-part products do publish.
Still needs prep. Adhesion is adhesion. No etch is included.
Worth knowing about: Rust-Oleum's EpoxyShield 1-car kit is a genuine 2-part water-based epoxy at not much more than paint money, and it includes the etch. If the only reason you were choosing paint was price, that is the comparison to make — a 2-part system with prep included, for a single bay.
What you give up against paint is the convenience: EpoxyShield needs mixing and takes three days to vehicle traffic. What you gain is a materially tougher floor.
#ad · Price as of October 5, 2026 · Affiliate disclosure for the link to 100% Solids Epoxy, 1 Gallon
#3Best 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 it anyway
The temptation with paint is to skip the prep because it is 'only paint'. Adhesion failure looks the same whatever you put down: it peels in sheets a few months later, usually where the car parks.
For a tidy, better-looking floor, yes. For a floor that takes hot tires, jack stands and dropped tools for a decade, no — and KILZ does not claim otherwise. It is an epoxy-acrylic paint with real coverage (300-400 sq ft per gallon) and no mixing or pot life, and it is honest about its limits.
What is the difference between 1-part and 2-part epoxy?+
Two-part epoxy cures by chemical reaction between a resin and a hardener, producing a thick, hard, bonded film. One-part paint dries by evaporation, like any paint, producing a thinner film. The 2-part is substantially more durable; the 1-part is substantially easier to apply.
How much floor paint do I need?+
KILZ publishes 300-400 sq ft per gallon on smooth surfaces. A 400-480 sq ft two-car garage therefore needs one to two gallons, and porous concrete pushes you to the higher figure. Buy at the pessimistic end.
Do I still need to etch for 1-part paint?+
Yes. Adhesion is adhesion, and prep decides it whatever you put down. No etch comes with floor paint, so buy a prep product separately — see the best garage floor cleaners.
When should I choose paint over epoxy?+
When you are selling the house, when you want tidy rather than armored, when the garage has light use, or as a first attempt before committing to a three-day 2-part job. Also when mixing and pot life are genuinely off-putting — a 1-part paint waits for you and a 100% solids epoxy does not.
Sources
KILZ 1-Part Epoxy floor paint listing — Published 300-400 sq ft per gallon on smooth surfaces, satin finish, and an explicit statement that it is not for forklift traffic or hydrostatic pressure.
