Fiberglass Mat

Fiberglass Mat, also known as Chopped Strand Mat or CSM for short, is a non-woven material typically used for laminate build-up and repair work. It consists of glass fibers laid randomly across each other and held together by a styrene binder.

For wetting out this form of glass fiber material, use a styrene thinned resin such as Polyester as it readily dissolves the styrene bonding agent that attaches the strands. This tooling cloth can be used with epoxy resin, but requires additional time and labor to saturate properly.

This fiberglass chopped strand mat is offered in various weights per square foot. The lightest version, veil mat, is used commonly as a finishing layer to mask any print-thru in a laminate schedule. This particular veil mat uses longer, thinner fibers than heavier mat weights also offered here. Coarser, heavier mat is commonly used for bulk, random axis strength buildup and is also an excellent initial layer when bonding repair work.