Fiberglass is a simple type of plastic reinforced with glass fiber. In order to produce these glass fibers, the glass is heated until melted, then passed through extremely fine openings, creating glass fibers that are very thin - so thin that they are measured in microns.
Fibers can be randomly bundled, rolled into a sheet or woven in fabric. Cheaper and more flexible than carbon fiber, the fiberglass is tougher than many metals, lighter in weight and can be moulded in complex shapes.
Its applications include airplanes, boats, cars, bathtubs and enclosures, swimming pools, Jacuzzis, septic tanks, water tanks, roofs, pipes, facings, moulds, surfboards, etc.