Fiberglass is a weather resistant material used for boat building since World War II. It is strong, lightweight, and resists expanding or contracting, making it easy to use over wood, fiberglass, or other composite materials. We offer many sizes of fiberglass cloth, as well as Biaxial Cloth, Woven Roving, and Fiberglass Matting to make completing your next project as easy as possible. Check each product for application suggestions or go to our How To videos and guides page for more information on using knitted reinforcements.