GLT Products Fiberglass Pipe & Tank Wrap is fabricated from a semi rigid fiberglass with segmented sections designed to insulate large piping (over 8″ IPS) and curved surfaces. It is made with fibers perpendicular to the surface, and is available in ASJ or FSK facings and is suitable for installation over hot, cold, concealed and exposed piping systems. Used to insulate cold and hot surfaces from –60 ÌŠF to 650 ÌŠF.