400 square feet at 10 mils and 100 percent solids is 400 × 10 / 1,604, about 2.49 gallons. A 1 gallon kit means 3 kits. If the product is 50 percent solids, type 0.5 and you need twice the liquid for the same dry film. The slab under the epoxy is concrete. Wall paint is paint.
FAQ
Where does 1,604 come from?
A US gallon is 231 cubic inches. A mil is 0.001 inch. Spread one gallon 0.001 inch thick and you cover 231 / 0.001 / 144 = 1,604 square feet. Thicker film covers less. A 50 percent solids kit covers half of that at the same dry film, so type the solids from the data sheet.
Is this paint?
Paint pages use the square feet per gallon on a wall-paint label, usually a few hundred. Epoxy film is specified in mils. Use this page for a floor kit. Use the paint page for walls.
Sources
- NIST, gallon of 231 cubic inches: The 1,604 square feet per gallon per mil is 231 ÷ 0.001 ÷ 144. This build uses 1604.167.