Before caulking, use J & R Products, Inc. 3/4" x 1100' Foam Backer Rod to help fill gaps and openings in pavement cracks, wall joints, foundations, sidewalk, and driveways. The backer rod helps cushion and insulate and helps prevent 3-point bonding.
- Fills gaps and openings in pavement cracks, wall joints, foundations, sidewalks, and driveways
- Non-absorbent, closed-cell polyethylene pre-caulking material
- Twist multiple strands together to fill large cracks, gaps
- Gray finish