Soft Backer Rod is a soft, grey, pliable, non-gassing back-up material consisting of both open & closed cells inserted into an expansion or contraction joint to:

  • Control sealant depth
  • Create a backstop to allow proper sealant tooling
  • Ensure sealant adhesion to joint surfaces only
  • And yield a proper bond break between back-up material and sealant. It can also be used as a temporary joint seal.

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