Fast Skin Time, Less Dirt Pick UpPrimerless Adhesion on Most Common Construction SubstratesRegular DyMonic Available in Sausage PacksC.R. LAURENCE 960806323 CRL White Tremco DyMonic FC Polyurethane Sealant. CRL Tremcor DyMonicr FC is a fast skinning, high performance, low modulus, one-component, moisture curing, polyurethane sealant. DyMonicr FC features a smooth, consistent surface when cured. It requires no priming when used on most common substrates, provided surfaces are dry, clean, and free from contaminants. It is supplied in a non-sag consistency which will gun easily with conventional caulking equipment. Because it skins in only one hour at 70 F (21 C) there is less dirt pick up compared to other polyurethane sealants. Regular DyMonic typical skin time is 16 hours at 70 F (21 C).. Part Numbers Variations: 960806323