Thermo-Sun GP® SP Metal Grey Attractive, grey looking solar control glass that meets new South African building codes even in monolithic applications. The latest development from Guardian Glass offers a highly desirable grey appearance with a low internal and external reflection. Thermo-Sun GP® SP Metal Grey was tested in South Africa for its durability and combines several compelling benefits in one: good solar control, natural light transmission, and low emissivity winter U-Value. Thermo-Sun GP® SP Metal Grey is a robust coating designed to be optimally applied to clear float glass, resulting in a high colour rendering index for true views on the outside. The product carries an Environmental Product Declaration (EPD) and is covered by a UL Product Lens™ Certification.