Gtechniq Glass & Plexiglass Coat - 250mlGlass & Plexiglass Coat 250ml Why Use Gtechniq Marine Glass & Plexiglass Coat? Gtechniq Marine Glass & Plexiglass Coat greatly reduces the surface energy of glass and plexiglass surfaces, thereby making water form into tight droplets that readily roll off the surface. This improves visibility by both quickly clearing these surfaces of water and leaving less water residue on the surface to dry out as water spots. Features: Repels water Improves