The Closed Cell Backer Rod is a 25-foot long foam filler made of polyethylene with a thickness of 1/4 inch. It is designed to be compatible with all cold-applied sealants and features moisture retardant and water-resistant properties. This gray-colored backing rod is suitable for various surfaces such as copper pipes, plywood, drywall, and concrete, providing insulation and soundproofing qualities for building materials and supplies. Made in the United States, this pre-cut, no-dust material helps control condensation and is ideal for use in insulation and commercial applications.
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