Epoxy Floor Coverage Calculator for Accurate Estimates
How Epoxy Floor Coverage Rates Work
Calculating epoxy floor coverage accurately prevents material shortages and eliminates costly job delays. We design and manufacture high-performance resin systems, and we know that coverage isn’t a fixed number—it depends on product chemistry, applied thickness, and substrate condition.
Understanding Square Footage Per Gallon
Theoretical coverage for a standard liquid coating is 1,604 square feet per gallon at 1 mil thickness. However, practical square feet per gallon epoxy yields depend on the specific formulation and build height:
- Thin-mile coatings (2–3 mils): 400–500 sq. ft. per gallon
- Medium-build coatings (8–10 mils): 160–200 sq. ft. per gallon
- High-build self-leveling (16–20 mils): 80–100 sq. ft. per gallon
How Millage (Mils) Dictates Coating Thickness
We measure film thickness mils epoxy to control durability and finish quality. One mil equals 1/1000th of an inch (0.0254 mm).
- Wet Film Thickness (WFT): The depth of the liquid immediately after application.
- Dry Film Thickness (DFT): The final depth after the coating fully cures and volatile compounds evaporate.
Thicker applications require more material per square foot, directly reducing total area coverage per gallon.
100% Solids Epoxy vs. Solvent-Based Coatings
The ratio of solids to solvents dictates your final dry film thickness:
| Feature | 100% Solids Epoxy | Solvent/Water-Based Coatings |
|---|---|---|
| Solids Content | 100% active resin/hardener | 40% – 60% solids (rest evaporates) |
| WFT to DFT Ratio | 1:1 (10 mils wet = 10 mils dry) | 2:1 (10 mils wet = 5 mils dry) |
| Shrinkage | Zero shrinkage | Significant shrinkage during cure |
| Coverage Efficiency | Maximum build per gallon | Requires multiple coats for build |
Our 100 solids epoxy coverage delivers a thicker, protective shield in a single pass because no volume is lost to evaporation.
Rough Concrete vs. Smooth Surface Absorption Rates
Concrete porosity dramatically impacts actual material consumption:
- Smooth Troweled Concrete (CSP 1): Low absorption; yields maximum coverage rates.
- Acid-Etched / Lightly Ground (CSP 2): Standard absorption; expect a 5%–10% drop in coverage.
- Shot-Blasted / Coarse Profile (CSP 3–5): High absorption; rough profile consumes up to 20%–30% more material as the base coat fills surface micro-fissures.
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