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Backer rod

A flexible foam rod used to fill joints and gaps before applying sealant.

A backer rod is a flexible foam strip used as a backing in joints before applying sealant, ensuring proper depth and adhesion. It is crucial for optimizing joint performance, enhancing durability, and supporting weatherproofing. By providing a reliable and effective backing solution, backer rods support efficient joint sealing, reduce material use, and contribute to successful project delivery by ensuring that joints are well-sealed, aligned with design specifications, and capable of meeting performance criteria and environmental conditions.

Used in a sentence

A backer rod was inserted into the joint before caulking was applied.

Synonyms/variation
  • Joint Filler

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