Fiberglass filaments increase the density of cement, which can effectively solve the problem of penetration. You can use it for industrial and civil construction, such as roof, basements, large crafts, stepping stones, pond, patios, pools... High-strength and soft, so it can finally become an excellent structural material after combining with the shape of the resin Fiberglass is a kind of inorganic nonmetallic material with excellent performance, which is usually used as reinforcement material in composite materials, electrical insulation material and thermal insulation material It is inorganic fiber, non-combustible and has good chemical resistance, heat resistance are good. Weight: 2.5LB/ Pack