Glass reinforced plastic? Just say FIBERGLASS,(reply>), @Elle Sea i always thought it uses windows... damn,(reply>), @Tom Scott I worked with Glass reinforced plastic for a while, its a combination of a sheet of fiberglass and a polymer. The fiberglass acts as a frame for the polymer and gives it something to bind to give it some integrity much like rebar in concrete.,(reply>), Mine sweepers today are usually made from Glass reinforced polyester or (GRP) for short.,(reply>), So Fiberglass as commonly know is a GRP<br>but GRP is made using Fiberglass<br><br>I guess in jargon fiberglass &amp; GRP are different but in lay speak Fiberglass would be correct,(reply>), Dan ny Glass reinforced plastics are found in common things such as in the plastic in drills and other powertools. No idea how that boat is made but the term is different from fiberglass.