71464 Closed-Cell Polyethylene Caulk Backer Rod, Gray, 3/8 In. X 20 Ft.

The M-D 71464 caulk backer rod is a pre-caulking filler designed to go into gaps and joints before you apply caulk. By filling the void first, it ensures caulk adheres properly, uses less material, and creates a longer-lasting seal. This is especially important for wider gaps and openings where caulk alone would sag or fail to bond correctly.

Made from non-absorbent, closed-cell polyethylene, this backer rod repels moisture and stands up to harsh outdoor conditions. The 20-foot roll reduces the need for multiple pieces on larger jobs, making it efficient for both small repairs and substantial caulking projects around your home or property.

Features and Benefits

• Pre-Caulking Support: Fills gaps and openings larger than 1/2 x 1/2 inch before caulk application, ensuring proper bonding and preventing 3-point bonding that can weaken joints over time.
• Non-Absorbent Material: Closed-cell polyethylene construction repels moisture and prevents water intrusion, extending the life of your caulked joints.
• Weather-Resistant: Robust construction withstands harsh outdoor conditions, making it suitable for exterior sealing applications.
• Efficient Size: The generous 20-foot length reduces the need for splicing or multiple pieces, saving time and effort on large jobs.
• Economical: By providing proper void fill, it reduces the amount of caulk needed while improving the quality of the final seal.

Specifications

• Brand: M-D
• Model: 71464
• Diameter: 3/8 inch
• Length: 20 feet
• Color: Gray
• Material: Closed-cell polyethylene
• Type: Non-absorbent caulk backer rod