MD Building 71464 3/8 Inch By 20 Foot Backer Rod

Key Features

• 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

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