What quantity of epoxy do I need?
To determine the quantity of WEST SYSTEM Epoxy needed to coat a given area, use this handy quantity table.
| Resin Quantity | Hardener Quantity | Mixed Quantity | Saturation coat porous surfaces | Buildup coats non-porous surfaces |
|---|---|---|---|---|
| 105-A 1 qt (.94L) 2.40 lb | 205-A or 206-A .43 pt (.20 L) .47 lb | 1.2 qt (1.15 L) 2.87 lb | 90-105 ft² (8.5-10m²) | 120 – 135 ft² (11-12.5m²) |
| 105-A 1 qt (.94L) 2.40 lb | 207-A or 209-A .66 pt (.31 L) .70lb | 1.3 qt (1.26 L) 3.1 lb | 90-105 ft² (9-10 m²) | 120-135 ft² (11-13 m²) |
| 105-B .98 gal (3.74 L) 9.50 lb | 205-B or 206-B .86 qt (.81 L) 1.86 lb | 1.2 gal (4.55 L) 11.36 lb | 350-405 ft² (32-37 m²) | 462 – 520 ft² (43-48 m²) |
| 105-B .98 gal (3.74 L) 9.50 lb | 207-B or 209-B 1.32 qt (1.24 L) 2.75 lb | 1.3 gal (4.98 L) 12.25 lb | 370-430 ft² (35-40 m²) | 490-550 ft² (45-50 m²) |
| 105-C 4.35 gal (16.46 L) 41.82 lb | 205-C or 206-C .94 gal (3.58 L) 8.20 lb | 5.29 gal (20 L) 50.02 lb | 1530-1785 ft² (142-165 m²) | 2040-2300 ft² (190-213 m²) |
| 105-C 4.35 gal (16.46 L) 41.82 lb | 207-C or 209-C 1.45 gal (5.49 L) 12.0 lb | 5.8 gal (21.9 L) 53.82 lb | 1675-1955 ft² (155-180 m²) | 2235-2520 ft² (207-233 m²) |
Estimating epoxy quantity and coverage
For a sealer coat, figure 40 square feet per pound of mixed material. For a typical “flow coat” over a sealed surface, about 1/8″ thick, figure 0.75 pounds per square foot (a Group size A 105 Resin/207 Special Clear Hardener weighs 3.11 lb). Use this to estimate how much to buy and to mix depending on the desired thickness and the area to be covered.
For best clear finish applications, use 207 Special Clear Hardener with 105 Resin. Warm the resin and hardener before dispensing to about 80°F to reduce viscosity.
If Mini-Pumps pump too slowly, you can mix the epoxy by volume. Refer to the hardener label for the correct volume mix ratio. When working with a large quantity of mixed epoxy, keep in mind the shorter pot life and risk of exotherm. Use a slower hardener, preferably 207 Special Clear Hardener.—From Table Top Applications by J.R. Watson, Epoxyworks #22