Fiberglass Reinforced Plastic (FRP), also known as GFRP, refers to a reinforced plastic made by reinforcing unsaturated polyester, epoxy, or phenolic resin matrices with glass fibers or their products. This type of reinforced plastic is called glass fiber reinforced plastic or glass steel, which is different from tempered glass.

Due to the different types of resins used, there are distinctions such as polyester glass fiber, epoxy glass fiber, and phenolic glass fiber. They are lightweight yet hard, non-conductive, with stable performance, high mechanical strength, low recyclability, and corrosion resistance. They can replace steel in manufacturing machine parts and the outer shells of cars, ships, and more.