Marabu Relief Paste is a water-based, high-viscosity paint which is applied from a tube with a fine line tip. This can be used to outline designs in relief on glass, metal, plastic and other nonporous surfaces. Relief paste can be used on nonporous and semi-porous surfaces such as glass, Plexiglas, metal, ceramic, vinyl, and polypropylene. The paste is dishwasher safe without being fired, leave it for 3 days or baked in the oven at 320F for 30mins to make it dishwasher safe. Cleans up when wet with soap and water.