Castor Sealer is a liquid that is ideal for sealing latex materials and appliances. Castor sealer stops absorption of makeup into the latex, which allows for truer color and longer wear. After sealing, creme makeup can be applied to latex. It eliminates the need for rubber mask grease. To use: Apply a thin layer on bare latex appliance. Allow to sit and absorb for a few minutes, than wipe off access. Apply any cream makeup you desire.