Features: This 18oz fiberglass cloth has features like high tensile strength, dimensional stability, high temperature resistance, rust resistance, insulation flame retardant, and chemical resistance. Composition and Size: This fiber glasses cloth is made from glass fibers woven into specific patterns. 0.5mm thick plain weave, it measures about 39.3? wide, 3 ft/ 1 yd long, and weighs 18 oz/sq.yard. Versatile Use: Fiberglass cloth can be used to repair holes or cracks in many surfaces, including metal, plastic, ceramic, wood, etc., great for use in boats, auto, craft, surfboards, tubs, pools, etc Resin Compatibility: This woven fiberglass cloth is compatible with Epoxy, polyester, and vinyl ester resin systems. This makes it an essential product in the fiberglass repair kit. Easy to Use: Fiberglass Repair Cloth is lightweight & flexible that can be cut to the size as per your custom requirement, making it easy to use with fiberglass resin for strong waterproof repair work