Fiberglass is a type of fiber-reinforced plastic that uses glass fibers as the reinforcement. It is a strong, lightweight, and versatile material that can be used for many applications, such as insulation, boat hulls, car parts, and circuit boards. Fiberglass is made by heating glass until it is molten and then forcing it through tiny holes to create thin filaments. These filaments can be woven into a fabric or mixed with a resin to form a composite. Fiberglass has many advantages over other materials, such as being non-magnetic, non-conductive, transparent to electromagnetic radiation, and chemically inert under many conditions. However, it also has some disadvantages, such as being less stiff and strong than carbon fiber, and being brittle and prone to cracking under stress.


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Fiberglass was accidentally discovered in 1932 by a researcher at Owens-Illinois who directed a jet of compressed air at a stream of molten glass.

Fiberglass is widely used in the composites industry and has many variations, such as glass-reinforced plastic (GRP), glass-fiber-reinforced plastic (GFRP), and glass-fiber-reinforced epoxy (GFRE).

Fiberglass can be recycled by melting it down and reforming it into new products, or by grinding it into a powder and using it as a filler or reinforcement for other materials.