skip to Main Content


Use the following Resin Chart as a guideline to determine resin coverage. Resin to glass usage for polyester and epoxy are very similar.

1 Gallon of Resin Wets Out

Materials Sq. Ft.
.75oz Mat 64 SF
1.50oz Mat 32 SF
3.50oz Cloth 150 SF
6.00oz Cloth 90 SF
10.00oz Cloth 60 SF
13.00oz Unidirectional 26 SF
1708 Biaxial 27 SF
18.00oz Worven Roving 40 SF
1808 Biaxial 26 SF
24.00oz Worven Roving 32 SF
2415 Bi-Ply 16 SF

(50″ wide material = approx.. 12 square foot per linear yard)

Example for figuring amount of fiberglass needed

Mr. Smith wants to put an epoxy and glass covering of 1 layer of 10 oz cloth and 1101/2102 epoxy. The cabin top is 9 feet wide by 10 feet long (9×10=90 square feet). The total area to be glassed is 90 square feet.

The cabin top width is 108 inches. Using 38 inch wide cloth, Mr. Smith needs three 10 ft. pieces. (108 in . ÷ 38 in. cloth = 2.84 or 3 pieces).

Always consider the width of the cloth plus an overlap allowance at the seams. (We recommend overlapping all seams 1 to 4 inches.)

Since Mr. Smith will be using 90 square feet. (3-10 ft. x 38 in. pieces) of material, he should refer to the resin chart to determine the amount of resin he will need. In this example, Mr. Smith will need one and one half (1-1/2) gallons of resin to cover the cabin top of his boat.

Leave a Reply

Your email address will not be published. Required fields are marked *

Want to receive promotions and important info from LBI Fiberglass?
Join Our Newsletter
×Close search