Pro Grade Foam Backer Rods 12 Pack For Expansion Joints Straightforward Install Black Sealant Strips Tight Fit For Concrete Gaps And DIY Repairs No Sweat Setup Heavy Duty Build Handles The Grind Effortlessly Without Breaking A Sweat

Black Foam Backer Rods 12 Pack For Sealing Concrete Gaps
✔️ Twelve pack measures 1.5in plus 38mm thick plus 24in plus 610mm longer for backing gaps

This 12 pack of black foam backer rods acts as a reliable spacer for expansion joints and concrete cracks before you apply sealant. Homeowners and contractors typically press these pre cut strips into vertical wall seams, pavement gaps, and door window frames to keep caulk from sticking too deep. The compressible nature creates the perfect backing layer that stops leaks while letting surfaces expand safely during temperature swings.

✅ Pre cut length saves time compared to rolling or unspooling custom cuts
✅ Compressible closed cell foam resists moisture and road grime
✅ Fits snugly into 1.5 inch wide joints for solid caulk adhesion
✅ Black color blends cleanly with asphalt and cured sealant

💡 How do I choose the right size backer rod for expansion joints?
Picking the correct diameter ensures your sealant forms properly without tearing during structural movement.
- Match the rod thickness to roughly half the width of your gap for optimal depth control
- Press the handy strip slightly deeper than the gap opening so it sinks flush below the surface
- Keep extra lengths nearby since standard packs handle multiple driveway patches or foundation seams without waste