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
- See More Details
Frequently Bought Together
Price:
$396
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
- Click here to learn more about Eco Options and Energy Efficiency
- California residents
Product Overview
- Fills large gaps and openings
- Provides a sound surface for caulking projects
- For use in expansion joints in driveways and sidewalks
Compare Similar Foam Tapes
 | |  |  | |
| Brand | Frost King | M-D Building Products | M-D Building Products | M-D Building Products |
| Name | 1/2 in. x 20 ft. Grey Poly Foam Caulk Saver Moisture Repellent | 5/8 in. x 20 ft. Gray Caulk Backer Rod for Gaps and Joints | 3/4 in. x 10 ft. Black Sponge Rubber Foam Weatherstrip Tape | 1/4 in. x 17 ft. Storm Door and Window Replacement Weather Stripping |
| Price | $351 | $396 | $398 | $901 |
| Ratings | (25) | (50) | (24) | (83) |
| Material | PVC | Other | Other | Other |
| Builders Hardware Product Type | Weatherstrip | Foam Tape | Foam Tape | Weatherstrip |
| Unspooled Length (ft.) | 20.0 | 20.0 | 10 | 17.0 |
| View Product | View Product | View Product | View Product |
Compare Similar Foam Tapes
| | | | |
| Brand | Frost King | M-D Building Products | M-D Building Products | M-D Building Products |
| Name | 1/2 in. x 20 ft. Grey Poly Foam Caulk Saver Moisture Repellent | 5/8 in. x 20 ft. Gray Caulk Backer Rod for Gaps and Joints | 3/4 in. x 10 ft. Black Sponge Rubber Foam Weatherstrip Tape | 1/4 in. x 17 ft. Storm Door and Window Replacement Weather Stripping |
| Price | $351 | $396 | $398 | $901 |
| Ratings | (25) | (50) | (24) | (83) |
| Material | ||||
| Builders Hardware Product Type | ||||
| Unspooled Length (ft.) | ||||
| View Product | View Product | View Product | View Product |
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
180-Day
Warranty / Certifications
Manufacturer Warranty
No
Questions & Answers
13Questions14Answers
What type of rope caulk can I use for exterior concrete use?
Asked by Jaf November 4, 20201
AnswerThis backer rod is closed cell and you will be able to use it outside
Can this be used as a filler before chaulking/repairing mortar between stonework?
Asked by Jan August 5, 20201
AnswerThis will work perfectly for that application.
termites will happily eat through , or set up home in styrofoam . is there any safeguard against...
Asked by hfa January 7, 20202
AnswersThank you for the question. Backer Rod is intended to be used as a backing for caulking projects. The caulking should provide this barrier.
Can I use this to fill the gaps in a fiberglass tub surround before caulking?
Asked by Tiakatz November 10, 20192
AnswersThat should work fine to fill large gaps, it is foam so you can trim it with a razor knife.
Can I spray paint this black?
Asked by INeedthis October 5, 20183
AnswersIt is a closed cell foam. Solvents in the paint would probably destroy it.
I see Brad below stated that this comes in sizes up to 4". Where can I buy these large sizes?
Asked by Alan April 8, 20171
Answer1" IS THE LARGES WE HAVE.
Does this come in a larger size diameter like 1" or ??
Asked by Alan April 8, 20171
AnswerHi 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!
Is this appropriate for the gap between the drywall and concrete floor in the interior of the house?
Asked by Ruby February 5, 20171
AnswerYes
Can this product be used on a roof parapet wall ? I would be putting it between the stucco wall a...
Asked by Norma December 29, 20161
AnswerThis product can be used.
Is this product water resistant? or Weather proof?
Asked by homeowner September 12, 20161
AnswerYes. It is a type of styrofoam material that is meant to be covered-up with a caulking product. Thank you for your interest in our product. M-D Building Products
Customer Reviews
Mar 17, 2017
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.
by JJMM
Customer review from homedepot.caDec 11, 2020
I used this to go between my sliding door and...
I used this to go between my sliding door and storm slider in my bedroom. It faces the ocean and when we get gale force winds, the storm slider plexiglass chatters against the storm door, keeping me awake. This worked perfectly to wedge between the two doors to stop the chattering, which was keeping me awake during a storm.
by MARY
Oct 23, 2020
I use this product a lot. I like it because...
I use this product a lot. I like it because if you are filling cracks in cement and in some places it is a smaller opening, you can cut this backer rod and fit it in a smaller opening or even double it, if the opening is larger.
by HomeDepotCustomer
Sep 13, 2020
Ordered 5/8 in. backer rod online, but they gave 1/2 in.
Ordered 5/8 in. backer rod online, but they gave 1/2 in.
by Redwan
Response from MDBuildingProductsSupportSep 17, 2020
We hate to hear that you received the incorrect product. Please return the incorrect product to the store to exchange it for the correct one.
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