Backer Rod for Expansion Joint and Crack Repair is a soft and pliable filler designed to partially fill concrete expansion joints or cracks in concrete before applying joint sealer caulk. This material is non-absorbent and allows the depth of the concrete joint sealant to be controlled. Backer rod comes in various sizes and will fit tightly into an opening to remain in place and contain self-leveling caulk. AR Chambers carries backer rod from vendors such as Armacell and Nomoco, as well as tools and accessories to use backer rod.
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