M-D Bldg Prods 71480 1/2x20 Backer Rod
BACKER ROD FOR GAPS & JOINTS
- Non-absorbent, closed-cell polyethylene
- Pre-caulking material
- Use before caulking to fill gaps
- Fills gaps larger than 1/2" x 1/2"
- Prevents 3-point bonding
Shipping
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