Auralex StopGap Acoustical Sealant (16 Oz Caulk Style Tube) - 12 PackStopGap Acoustical Sealant is a highly elastic, water based sealant used for reducing sound transmission at the perimeter of wall systems or around electrical box cutouts to achieve specified STC MTC values. The surface dries to a tough film but the sealant remains flexible and stays pliable for up to 5 times longer than alternative brands. And unlike other products, Stop Gap has no residual run off. StopGap is paintable and nonstaining, and meets
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