Premium Foam Backer Rod Expansion Joint Filler for Concrete & Sealant Foundations
High-density closed-cell polyethylene foam ensures superior durability and weather resistance, ideal for both indoor and outdoor applications. Prevents cracking in concrete joints, sidewalks, driveways, and foundations by absorbing movement and stress from temperature changes. Easy-to-cut design allows for custom sizing, saving time during installation for DIY projects or professional construction. Non-absorbent material resists mold, mildew, and moisture, maintaining long-term structural integrity in wet environments. Compatible with all sealants (silicone, polyurethane, etc.) for a seamless, watertight bond in expansion joints and gaps. Lightweight yet sturdy construction ensures hassle-free handling and compression recovery for repeated use. Perfect for contractors, landscapers, and homeowners seeking a reliable, cost-effective solution for concrete maintenance. Bulk pricing available—stock up for large-scale projects with our wholesale advantage.