The basic raw materials used in manufacturing the pipes are resin, fibreglass and silica sand. At normal circumstances, orthophtalic polyester resins are used since they give good performance for most applications. Only Flowtite approved raw materials are used for the production of a Flowtite pipe. The figure shows a typical cross section of a pipe laminate. This section, as well as the way of applying and placing the different raw materials, can differ depending on the pipe application.