For a quick chart of commonly requested coverage rates – CLICK HERE 

The approximate coverage area depends on how much material is contained in a unit (A+B by weight) and what the material yields on a cubic inches/lb. or cubic centimeters per kg. basis. Since each brushable mold rubber has a different yield as measured by cubic inches/lb. or cubic centimeters per kg., coverage rates will vary.

Example – Doing The Math

Calculating the coverage of a 1 gallon unit of Mold Max® Stroke;

• A 1 gallon kit of Mold Max Stroke (A+B) contains 11 lbs.
• The cubic inch/lb. yield of Mold Max Stroke is 23.5 inches.

1. 11 lbs. x 23.5 cubic inches per pound = 259 cubic inches
2. Divide 259 cu. in. by .375 (3/8″) = 691 square inches
3. Divide 691 by 144 (no. of square inches in a square foot) = 4.8 square feet
4. 4.8 square feet (0.45 m2) is coverage of a gallon unit of Mold Max applied 3/8″ thick.

Calculating the coverage of a 5gallon unit of Mold Max® Stroke;

• A 5 gallon kit of Mold Max Stroke (A+B) contains 55 lbs.
• The cubic inch/lb. yield of Mold Max Stroke is 23.5 inches.

1. 55 lbs. x 23.5 cubic inches per pound = 1,293 cubic inches
2. Divide 1,293 cu. inches by .375 (3/8″) = 3,448 square inches
3. Divide 3,448 by144 (no. of square inches in a square foot) = 24 square feet
4. 24 square feet (2.23 m2) is coverage of 5-gallon unit of Mold Max applied 3/8″ thick.

The following offers flat-area coverage rates for some of Smooth-On’s brushable mold making rubbers. The below values assume a final rubber thickness of 3/8″ / 0.95 cm,
4 layers of rubber applied as directed.

Rubber Product Coverage

Mold Max® Stroke – 1 Gallon Kit (11 lbs. / 4.99 kgs.) 4.8 ft.² / 0.45 m²
Mold Max® Stroke – 5 Gallon Kit (55 lbs. / 24.95 kgs.) 24 ft.² / 2.23 m²

Rebound® 25 – 1 Gallon Kit (16 lbs. / 7.26 kgs.) 7 ft.² / 0.65 m²
Rebound® 25 – 5 gallon Kit (80 lbs. / 32.29 kgs.) 35 ft.² / 3.25 m²

Brush-On™ 35 – 1 Gallon Kit (13.4 lbs. / 6.08 kgs,) 5.34 ft.² / 0.50 m²
Brush-On™ 35 – 5 Gallon Kit (75 lbs. / 34.02 kgs.) 29.86 ft.² / 2.77 m²

Brush-On™ 40 – 1 Gallon Kit (18 lbs. / 8.16 kgs.) 7.87 ft.² / 0.73 m²
Brush-On™ 40 – 5 Gallon Kit (90 lbs. / 40.82 kgs.) 39.33 ft.² / 3.65 m²

Brush-On™ 50 – 1 Gallon Kit (18 lbs. / 8.16 kgs.) 6.33 ft.² / 0.59 m²
Brush-On™ 50 – 5 Gallon Kit (90 lbs. / 40.82 kgs.) 32 ft.² / 2.97 m²

Brush-On™ 60 – 1 Gallon Kit (18 lbs. / 8.16 kgs.) 6.33 ft.² / 0.59 m²
Brush-On™ 60 – 5 Gallon Kit (90 lbs. / 40.82 kgs.) 32 ft.² / 2.97 m²