Premium Expanded Polyethylene Foam Backer Rod – Gap Filler & Waterproof Seal
High-density closed-cell polyethylene foam ensures superior durability and moisture resistance, ideal for long-term waterproof sealing. Pre-compressed design allows easy insertion into gaps, expanding to fill irregular spaces perfectly. Perfect for construction, DIY projects, and industrial applications—seals cracks in concrete, windows, doors, and pipes. Resistant to mold, chemicals, and extreme temperatures (-40°F to 180°F). Smooth surface and uniform density prevent crumbling or tearing during installation. Sold in bulk at unbeatable wholesale prices—stock up for large-scale projects. Buy direct, save more!