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3/4 in. Closed Cell Backer Rod
$7.10 on The Home Depot


Sika Backer Rod is used to partially fill deep expansion joints and cracks before application of your sealant. It helps prevent 3-sided adhesion while allowing you to control the depth of the sealant. Available in 3/4 in., 20 ft. length.

Easy to apply

Highly flexible and compressible

Will not absorb water

Good temperature resistance

Partially fills deep cracks before sealant application

Safe for the environment

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