CRL Glas-Slip is a specially formulated lubricant that makes working with glass and rubber gaskets easy. It's extra slippery and stays wet, so you can spread it on the entire gasket before you install the glass. Also makes the installation of filler strips quick and easy. Apply it with a brush or rag, or spread it on with your fingers. Glas-Slip comes in one gallon cans or handy quart size cans.