Composite materials are made up of two or more components. The simplest form of composite materials are made up of two constituent materials, e.g. glass fibre and polyester, which is the main composite material that Rempro AS produces. This is often referred to as "glass fibre". Typically, each component on its own is not suitable for construction purposes, but togeter the components make a rigid and strong material- composite. . Plastic, reinforced with different fibres, make up a large portion of the composite materials that are used in modern society. Such materials has many advantages; they are light, durable, flexiblel and strong.