Gtechniq G1 Glass Ceramic Coating 15mlWhy Use Gtechniq G1 ClearVision Smart Glass? Unlike regular rain repellent coatings that adhere to the surface of the glass using relatively weak physical bonds, G1 uses a chemical bond which gives G1 unrivalled durability. G1 ClearVision Smart Glass is extremely durable, the hydrophobic function improves wet weather visibility helping to improve safety and eye strain. It also makes removing contaminants from the glass such as ice, bugs and tree sap