M-D Building Products 71506 Caulk Backer Rod for Gaps & Joints 5/8 x 20

Non-absorbent closed-cell polyethylene pre-caulking material. Fills large gaps and openings to prevent drafts. Provides a sound surface for caulking projects. Prevents 3-point bonding. 5/8 x 20 ; Non-absorbant closed cell polyethylene pre-caulking material; Fills large gaps and openings to prevent drafts; Provides a sound surface for caulking projects; Prevents 3 point bonding.;