C.R. LAURENCE 947802 CRL Black Tremco Spectrem 2 High Performance Silicone Sealant. Tremcor Spectremr 2 Silicone Sealant is a medium modulus, one-part, high performance, neutral cure sealant ideal for a variety of caulking and glazing applications.. Part Numbers Variations: 947802 Powered by ExportYourStore.com