M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray

M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray Product DescriptionM-D Building Products 71480 Backer Rod for Gaps & JointsM-D Building Products 71480 Backer Rod for Gaps & Joints Features: Non-absorbent, closed-cell polyethylene pre-caulking materialUse before caulking to fill gaps and openings larger than 1/2″ x 1/2″ Prevents 3-point bonding20’71464: 3/8″71680: 1/2″71506: 5/8″From the ManufacturerPoly Foam Caulk Saver acts as a filler in large gaps before applying caulk. Insulates and cushions. Use in pavement cracks wall joints and foundations. The product is 1/2″x20′ Caulk Back Rod | Easy to use | The product is manufactured in China | Fills large gaps and openings to prevent drafts | Provides a sound surface for caulking projects | Recommended for use in expansion joints in driveways and sidewalks | Twist multiple strands of cord together for extra large gaps | Easily trimmed to size with scissors | Fills large gaps and openings to prevent drafts | Provides a sound surface for caulking projects | Recommended for use in expansion joints in driveways and sidewalks | Twist multiple strands of cord together for extra large gaps | Easily trimmed to size with scissors