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Internet #202066515

Model #71480

Store SKU #462440

1/2 in. x 20 ft. Caulk Backer Rod

$413
  • Fills large gaps and openings
  • Provides a sound surface for caulking projects
  • For use in expansion joints in driveways and sidewalks
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Product Details

Before caulking, use the MD Building Products 1/2 in. x 20 ft. Caulk Backer Rod to help fill gaps and openings in pavement cracks, wall joints, foundations, sidewalks and driveways. The backer rod helps cushion and insulate and helps prevent 3-point bonding.
  • Fills gaps and openings in pavement cracks, wall joints, foundations, sidewalks and driveways
  • Non-absorbent, closed-cell polyethylene pre-caulking material
  • Twist multiple strands together to fill large cracks, gaps
  • Gray finish
  • Return Policy
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Specifications

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Questions & Answers

33Questions
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Q:Will this work as a backer rod for vertical control joints in a concrete masonry unit (CMU) (retaining wall? If so, and assuming 3/8" wide spacing, would this 1/2" backer rod be the right size to fit snugly? Or would exact 3/8" backer rod be better?
by|Aug 28, 2022
1 Answer
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A:  Thank you for reaching out. Yes, this product will work for the described application. The product can be compressed to fit so I would recommend using the 1/2" backer rod for the 3/8" gap. Thanks

by|Aug 29, 2022
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    Q:Will it adhere to wood?
    by|Aug 14, 2022
    1 Answer
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    A:  no it won't, the polyurethane sealant adheres to the edges, which sealant you use let's you know if it adhered to wood.

    by|Aug 17, 2022
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      Q:Can this be used between utility sink and wall?
      by|Aug 11, 2022
      5 Answers
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      A:  I think it could. But it's cheap enough to try it and if it's not to your liking, pull it out. It's purpose is to fill gaps to reduce amount of caulk used to seal the gap. I used it to close the gaps in deck boards under a screened gazebo to keep insects out.

      by|Aug 17, 2022

        A:  Thank you for reaching out. This can be used between a utility sink and a wall. Thanks

        by|Aug 11, 2022

          A:  It could be used. Not sure how it would stay in place so caulking could be applied on top. If sheetrock, could use straight pins; block, then construction glue.

          by|Dec 2, 2022
            1 found this answer helpful

            A:  I don't know. I would ask a Home Depot representative or one of the many professionals that shop there.

            by|Aug 16, 2022

              A:  Not really, I used this in the strip at the base of my garage door.

              by|Aug 17, 2022
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                Q:Can this be used to fill gap on new exterior door between stone wall and door frame
                by|Jul 9, 2022
                2 Answers
                Answer This Question

                A:  Thank you for reaching out. Yes, this can be used for this application. Thanks

                by|Jul 11, 2022

                  A:  It depends on how big the gap is. Usually you will shove this in and cover it with a layer of exterior caulk .

                  by|Jul 12, 2022
                    Showing 1-4 of 33
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                    Customer Reviews

                    4.8 out of 5
                    (63)
                    • 4.8
                      out of 63 reviews
                    • 94%recommend this product
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                    Showing 1-10 of 63 reviews
                    Just what I expected
                    I am not using this product for its intended use. I am a quilter and cut it up to replace the very costly Pinmoors used in quilt layering.
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                    • Recommended
                    13 found this review helpful
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                    Worked as advertised...
                    Worked as advertised
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                    Description was correct. I would buy them again...
                    Description was correct. I would buy them again
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                    Did not meet my expectations. Could not use. ...
                    Did not meet my expectations. Could not use. It just didn't work.
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                    Response from MDBuildingProductsSupportSep 2, 2022
                    Thank you for your review. We hate to hear the product did not meet your expectations, please call our customer service at 800-654-8454 if you would like to discuss other options.
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                    Good stuff used it many times...
                    Good stuff used it many times
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                    Showing 1-10 of 63 reviews

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