How thick should epoxy floor coating be?

For domestic garages, a total dry film thickness (DFT) of 200-300 microns is sufficient. Light industrial floors need 300-500 microns. Heavy industrial or forklift areas need 500-1000+ microns. The primer coat is typically 50 microns, with build coats at 100-250 microns each. The DFT is roughly 50-60% of the wet film thickness due to solvent evaporation.

What is the mix ratio for 2-part epoxy?

Most 2-part epoxy floor coatings use a 2:1 or 3:1 base-to-hardener ratio by volume. Always follow the manufacturer's instructions exactly — incorrect ratios will cause soft spots, poor adhesion, or failure to cure. Mix thoroughly for 3-4 minutes, scraping the sides and bottom of the container. The mixed product typically has a pot life of 20-40 minutes.

Do I need to prime concrete before epoxy?

Yes, an epoxy primer is essential. It penetrates the concrete pores, improves adhesion, and reduces bubble formation (outgassing) in the build coat. On new concrete, allow 28 days curing before priming. On existing concrete, degrease and etch with acid or diamond grind for best results. The primer typically covers 6-8 m²/L.

How long does epoxy floor coating take to cure?

Epoxy floor coatings are typically touch-dry in 12-16 hours at 20°C, light foot traffic after 24 hours, and full cure in 7 days. Do not apply at temperatures below 10°C as curing will be very slow. Above 30°C, the pot life is significantly reduced. Vehicle traffic should wait at least 72 hours, ideally 7 days.

What aggregate should I use for anti-slip epoxy floors?

Quartz sand (0.3-0.8mm grade) is the most common anti-slip aggregate for epoxy floors. Broadcast at 3-4 kg/m² into the wet build coat, then vacuum excess after curing and apply a seal coat. For heavy-duty anti-slip, aluminium oxide aggregate gives superior grip. Coloured quartz flakes are used for decorative finishes in showrooms and retail spaces.

TradeCalculator

Epoxy Floor Coating Calculator — Resin, Primer & Aggregate

Calculate 2-part epoxy floor coating quantities including primer, build coat, aggregate broadcast, and seal coat for garage and industrial floors.

Floor Area

Total floor area to coat

Coating System

Standard 2-coat is sufficient for most garages

Price Per Kit (optional)

Per mixed kit (base + hardener)

Kit Coverage

Coverage per kit from manufacturer

Include anti-slip aggregate

Quartz sand broadcast at 3 kg/m²

How We Calculate This

This calculator works out epoxy floor coating quantities for a complete system including primer, build coat(s), aggregate broadcast, and seal coat.

The formula

Primer = Floor area × 0.15 L/m² × Wastage

Build coat = Floor area × 0.30 L/m² × Number of coats × Wastage

Seal coat = Floor area × 0.12 L/m² × Wastage

Aggregate = Floor area × 3.0 kg/m² × Wastage

For a 40 m² garage with standard 2-coat system: Primer = 40 × 0.15 = 6 L. Build coat = 40 × 0.30 = 12 L. Total = 18 L plus 10% waste = ~20 L.

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Verify with your supplier.