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Makes professional joints that last
Helps fill in and insulate large caulk joints and allows the caulking to absorb more movement
Closed cell design repels water to help protect the joint from damage
Complies with ASTM C 1330, Type C
Measures 5/8-inches diameter by 50-feet length
Easy to fit - soft and pliable so it fits into the joint easily
Water resistant - unlike open cell backer rod, it repels water to help protect the joint from damage
Fills the joint so you use less caulk
Fully compatible with all substrates and sealants
Product Description Sashco 30623 Pre-Caulking Filler Rope Backer Rod 5/8-Inch x 50-Feet, Grey From the Manufacturer Sashco Pre-Caulking Filler Rope Backer Rod is a 5/8-Inch by 50-foot soft cell backer rod with water-resistant skin.