These beads are coated with a special coating during the manufacture of the glass beads. In the rainy and foggy weather, the moisture can not easily adhere on the surface of glass beads, so the effection on reflectivity caused by bad weather will be reduced. The granulometry of anti-moisture coated glass beads is the same as non-coated glass beads. This type of glass beads is brighter in terms of its particular silicone coating and is more reflective than ordinary glass beads. Also, it ( silicone coated ) will not lose its reflection and brightness during rain and fog, and it will show the lines. Due to the above characteristics, it has the highest consumption in road marking.