4oz e-glass fiberglass fabric is 6522 120g/m2 cloth. It is woven in plain weaving type. Thread count is 9.6 / 8.7 per cm. Fiberglass fabric is very high strength, abrasion resistant and fire resistant. This light weight is especially easy to wet out by resins. So it is mainly used for surfboard manufacture, same as 6oz and 8oz fabric. It also can be used for surfboard/boat/yacht building and repair.
Fiberglass fabric is able to resist heat below 550℃ continuously. Except for surfboard application, this 4oz fiber glass fabric can be used in many other fields, such as septic-tank, swimming pool production, coated fiberglass fabric, electrical insulation and printed circuit board.