COST-2118 is two-parts, neutral, room temperature cured silicone sealant for hollow glass. Characteristics 1. COST-2118 is two-parts, ... neutral, room temperature cured silicone sealant for hollow glass,which does not pollute the environment.2 ... sealing cracks.3. No need for coating while use this silicone sealant, there is good adhesion to a large varietyof materials, and ...