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Building Caulking - Silicone vs. Polyurethane Sealant - PCM Services

Jun 12, 2013 ... Changes in temperature cause the joints to expand and contract. Typically, the more flexibility the sealant allows the better. Silicone allows for greater movement if that's what's necessary. What does this mean for the owner? For a full system replacement, most manufacturers of polyurethane offer a 5 year ...