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Used for backing large gaps prior to applying sealant.

Price: $4.19
In stock
Availability: In Stock
Ships Next Day or Sooner™
BKR-ROD

Item #: BKR-ROD
Availability: In Stock
Ships Next Day or Sooner™

Backer Rod acts as a "backer" to minimize the amount of caulk used to seal an opening. Use this product as a backer between the foundation and the new block when sealing foundation vents or when sealing gaps between the foundation and the sill plate.

3/4" x 20' long each.
  • 3/4" x 20' long each.
Overall Customer Rating of 1 Reviews:
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crawlspace

seal around vents

Rating:
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Pros:
Cons:
used this to seal around the vents. Put a 4x8x16 solid block in where the vents were after closing them then pushed the backer rod into the gaps about 3/4 inch to seal off air flow then used the cement caulk. Didnt order enough so used a water noodle of the kids for the last 4 vents. You can improvise but backer rod is inexpensive and works great.