Can Glass Paint Be Diluted With Water?

No, it cannot be diluted with water. The paint used on glass is acrylic. Acrylic can color glass, provided it is not diluted with water. Once dry, acrylic forms a thin, waterproof film that adheres well to glass, as long as it is not intentionally scratched. Acrylic paint is a new type of painting pigment made by mixing a chemically synthesized latex (containing acrylates, methacrylates, acrylic acid, methacrylic acid, as well as thickeners, fillers, etc.) with color particles.