Weldbond Adhesive is a clear drying glue that is great to use for any mosaic, or glass-to-glass project. It is also highly water-resistant and will not become brittle with age. Instructions for use: clean and dry surface, apply Weldbond to both pieces. Dries in 1 hour (longer drying time required for non-porous items). Full cure time is approxiamtely 24 hours. Any whiteness indicates the curing process is not complete, remember a little goes a long way. Do not allow to freeze. Clean up with just water. PSI=1200LBS per sq. ft.