Backer Rod 1/4 inch, EPDM Closed-Cell Foam Caulk Saver for Expansion Joint Filling, Gap Sealing, Concrete Cracks, Windows and Doors, Gray (16ft)

Reliable Gap Filler and Joint Support for Long-Lasting Sealing This 1/4-inch EPDM backer rod is designed for professionals, homeowners, and DIY users who need a dependable material for filling joints and gaps before applying sealant. Made from durable closed-cell EPDM foam, it does not absorb water and maintains its flexibility even in harsh outdoor conditions—making it a superior option compared to standard PE backer rods, especially for concrete and exterior sealing projects. Use it to control sealant depth, reduce material usage, and create cleaner, more uniform finishes in a wide range of applications. Whether you're repairing driveway cracks, filling expansion joints, sealing around windows and doors, or completing home improvement tasks, this backer rod installs easily and stays in place. With excellent resistance to UV, rain, heat, and cold, this EPDM backer rod is built to perform year-round. It remains stable without breaking down, ensuring your sealing work lasts longer and withstands temperature changes and outdoor exposure. Flexible, easy to cut, and compatible with common sealants such as silicone, polyurethane, and acrylic, it offers a simple and effective solution for construction, remodeling, and DIY projects. Also useful for craft shaping, padding, and custom gap-filling tasks around your home.

• EPDM CLOSED-CELL FOAM — DURABLE & NON-ABSORBENT Made from EPDM closed-cell foam that does not absorb water and maintains its elasticity over time. More reliable outdoors than ordinary PE backer rods, especially in concrete and exterior sealing applications.
• FITS GAPS BEFORE SEALING Placed into the joint first to support the sealant if needed. Helps control joint depth and allows the sealant to form a smooth, clean finish when sealing is applied.
• EASY TO CUT & PRESS INTO PLACE Flexible and simple to work with. Cut to the needed length and press into the gap with your fingers or a small tool. Works well with silicone, polyurethane, acrylic and other common sealants when used together.
• WEATHER & TEMPERATURE RESISTANT Withstands UV exposure, rain, heat and cold without breaking down. Suitable for concrete expansion joints, exterior trim, siding, windows and door frames.
• For Home Repair, Construction & DIY Projects Ideal for filling gaps in driveways, sidewalks, walls, tile edges, baseboards and wood trim. Also useful for craft shaping and padding.