1/2" chopped strand fiberglass is made from short lengths of glass fiber, each cut to approximately half an inch. It is used as a reinforcement filler in resin systems to improve mechanical strength, stiffness, and bonding in structural and repair applications.

Chopped strand fiberglass is commonly used to reinforce epoxy, polyester, or vinyl ester resin in applications like bonding, gap-filling, transom repair, stringer work, and layups where added strength and durability are required.

It is compatible with epoxy, polyester, and vinyl ester resins, making it a versatile reinforcement filler for a wide variety of marine composite projects.

Add the chopped strand gradually into fully mixed resin while stirring to distribute the fibers evenly. Continue adding until the mixture reaches your desired thickness—typically a stiff, trowelable consistency for bonding and structural filleting.

For structural filler applications, a good starting point is 1 to 1.5 quarts of chopped strand per 1 quart of resin. Adjust based on the desired consistency and level of reinforcement needed.