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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. The backer rod also provides a sound surface for caulking projects.
- Non-absorbent, closed-cell polyethylene pre-caulking material
- Easily trimmed to size with scissors
- Twist multiple strands of cord together for extra large gaps
