Matwsec 16.4Ft Foam Backer Rod 1/8 Inch Caulk Saver Gap Filler Seal Rubber

Our backer rod comes as a single roll in black, featuring a round closed-cell foam construction that provides reliable sealing for gaps and joints. As a foam backer rod, this versatile sealant backing fills cracks and voids before caulking, and the 16.4-foot length offers enough material for multiple projects. This rope caulk measures 0.13 inches (3.2 mm) in diameter and 16.4 feet (5 meters) in length, with a flexible design that conforms to various gap sizes, and the 1/8 inch diameter works well for narrow gaps around doors, windows, and trim. Made from durable closed-cell silicone foam, our weather stripping backer rod is resistant to moisture, dust, and air infiltration for long-lasting performance, maintaining its shape under compression. Whether you need white weather stripping for interior doors, closed cell backer rod for window frames, or foam seal for concrete expansion joints, our roll works well for sealing cracks, filling gaps around trim, and preparing joints for caulking in both indoor and outdoor projects.