The 3/8 in. x 240 in. Backer Rod is ideal for filling gaps. The backer rod is recommended for use in filling large gaps and openings to prevent drafts and also provides a sound surface for caulking projects.
- Recommended for use in expansion joints in driveways and sidewalks
- Fills large gaps and openings to prevent drafts
- Use before caulking to fill gaps and openings larger than 1/2 in. x 1/2 in.
- Provides a sound surface for caulking projects
- Twist multiple strands of cord together for extra-large gaps