Model # 71506

Internet #100165680

Store SKU #803064

M-D Building Products 5/8 in. x 20 ft. Gray Caulk Backer Rod for Gaps and Joints
0043374715064

M-D Building Products

5/8 in. x 20 ft. Gray Caulk Backer Rod for Gaps and Joints

  • Fills large gaps and openings
  • Provides a sound surface for caulking projects
  • For use in expansion joints in driveways and sidewalks
$397 /each
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Frequently Bought Together

Product Overview

The MD Building Products 5/8 in. x 20 ft. Gray Caulk Backer Rod for Gaps and Joints acts as a filler in large gaps before applying caulk. It insulates as well as cushions. Use in pavement cracks, wall joints and foundations. Backer rod is easily trimmed to size with scissors.

  • Fills large gaps and openings to prevent drafts
  • Provides a sound surface for caulking projects
  • Recommended for use in expansion joints in driveways and sidewalks
  • Easily trimmed to size with scissors
  • Multiple strands of cord can be twisted together for extra-large gaps

Info & Guides

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Specifications

Dimensions

Product Depth (in.)
240
Product Height (in.)
0.625
Product Width (in.)
0.625 in
Unspooled Length (ft.)
20.0

Details

Builders Hardware Product Type
Foam Tape
Color Family
Grays
Color/Finish
Gray
Density
15.0
Material
Other
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
No

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Customer Questions & Answers

Gap between my house and driveway

I have a gap about 1 1/2 inches between my house and the driveway. Would this be good to put in there?
Asked by: Lkuk
No, one should never twist multiple strands of backer rod together for a larger joint. You can buy it up to 4" OD. The reason is that backer rod's only purpose is for sealant shape and depth control. Joint sealant needs to have an hourglass shape and reasonable depth so it does not fail during expansion/contraction. Twisting multiple rods together will not give you a correct shape and will result in sealant failure.
Answered by: Brad
Date published: 2016-03-08

Is this product heat resistant? Can I use it with a heated sealant stick?

Asked by: Grandm
No it is not, but they make other backer rods for hot-applied sealants. These rods are rated to withstand roughly 200 degrees F, but that is not intended for extended exposure or hot sealants.
Answered by: Brad
Date published: 2016-01-12

I see Brad below stated that this comes in sizes up to 4". Where can I buy these large sizes?

Asked by: Alan
1" IS THE LARGES WE HAVE.
Answered by: MDBuildingProductsSupport
Date published: 2017-04-11

Does this come in a larger size diameter like 1" or ??

Asked by: Alan
Hi Alan, unfortunately we only offer the Gray Caulk Backer Rod for Gaps and Joints in 1/2 and 5/8 diameters on Homedepot.com. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot!
Answered by: THDSupport
Date published: 2017-05-26
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Customer Reviews

5/8 in. x 20 ft. Gray Caulk Backer Rod for Gaps and Joints is rated 4.8 out of 5 by 5.
Rated 5 out of 5 by from Good product that has a variety of different uses. My main use for it is when I have to caulk a r... Good product that has a variety of different uses. My main use for it is when I have to caulk a rather large gap. I'll first fill the gap with backer rod, then caulk. I get better much results that way. It gives the caulk something to grab to, and the caulk won't shrink too much.
Date published: 2017-03-17
Rated 5 out of 5 by from Great for Bat Proofing We are building a home in The Republic of Panama. One issue is that bats like to squeeze into the caps of the corrugated sub roofing and nest in the attic. The resulting guano can cause respiratory illness. This product was a perfect fix to fill the gaps.
Date published: 2009-11-03
Rated 5 out of 5 by from Really handy multi-useful, durability is better than expected,ease of use
Date published: 2016-10-20
Rated 4 out of 5 by from Material Saver The backer was fairly easy to install and saved a lot of caulking that is used after the backer is in place. It should last a good long time.
Date published: 2015-09-01
Rated 5 out of 5 by from Other Uses! Also very effective used as a filler/wad in .577/.450 M-H & .577 Snider ammunition. Just cut to length with an exacto knife to fill the void between powder & bullet's base.
Date published: 2015-10-06
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