m-d 71480 backer rod, 1/2 in dia, 20 ft l, polyethylene, gray

Non-absorbent, closed-cell polyethylene pre-caulking material helps repel moisture. Use before caulking to fill gaps and openings larger than 1/2 x 1/2 in. Prevents 3-point bonding.

• Poly foam caulk saver acts as a filler in large gaps before applying caulk
• Insulates and cushions
• Fills large gaps and openings to prevent drafts
• Twist multiple strands of cord together for extra-large gaps, easily trimmed to size with scissors
• Non-absorbent, closed-cell polyethylene pre-caulking material
• Use before caulking to fill gaps and openings larger than 1/2 in x 1/2 in
• Prevents 3-point bonding
• Provides a sound surface for caulking projects
• Recommended for use in expansion joints in driveways and sidewalks

• Catalog https://assets.unilogcorp.com/187/ITEM/DOC/M_D_100005179_Catalog.pdf