3/8″ x 20′
5/8″ x 20′
Soft Cell Backer Rod with Water-Resistant Skin.
Pre-caulking Filler Rope is a 3/8-Inch by 20-foot soft-cell backer rod with water-resistant skin (unlike an open-cell backer rod). It repels water to help protect the joint from damage. Soft and pliable so it fits into the joint easily. Fills the joint so you use less caulk, and it’s fully compatible with all substrates and Sashco sealants.
3/8″ x 20′ – $7.49 USD
5/8″ x 20′ – $7.99 USD
1-1/8″ x 10′ – $9.99 USD
3/8″ x 20′
Joints deeper than 1/2″, concrete cracks, door and window frames, foundation sill plates, wall joints
30100 3/8″ x 20′
30110 5/8″ x 20′
This is Why You Should Use Filler Rope
Compress to fit cracks and joints More Info
Water-resistant More Info
Saves money by using less caulk More Info
Compatible with all substrates & sealants More Info
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Common Questions From Our Network of Pros
In deep joints, filler rope serves two purposes. 1. It saves you money. Filler rope is pretty cheap, so using some of it (instead of more sealant) can save you time and money. 2. It creates ideal joint design. It serves as a “bond breaker” to ensure the sealant only has adhesion on two sides. This will extend the lifetime of the sealant.
It depends on the situation. Backer rod is a bit stiffer. Filler rope has more compressibility for irregular joints.