Marabu Glas is a lightfast, highly pigmented, transparent, water based paint designed for glass. Marabu Glas Glass Paints are low viscosity and flows easily for even application. Marabu Glas Glass Paints can also be used on other nonporous and semi-porous surfaces such as Plexiglas, metal, ceramic, vinyl, and polypropylene. Marabu Glas Glass Paints are dishwasher safe without being fired leave it for 3 days or baked in the oven at 320F for 30mins to make it dishwasher safe. Marabu Glas Glass Paints should be applied using soft natural fiber brushes and cleans up with soap and water. To avoid bubbles do not shake the bottle.