Internet #300839302

Model #C21CP

Store SKU #1002376030

E/O 3/8 in. Dia x 350 ft. Contractor Pack Caulk Backer Rod

  • Closed-cell poly-foam material seals cracks for energy efficiency
  • Polyurethane construction absorbs shocks and prevents vibration
  • Foam tape allows trimming to fit the desired length
  • See More Details

Frequently Bought Together

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Price:
$2678

Product Overview

The Thermwell Products 3/8 in. x 350 ft. Caulk Saver Contractor Pack helps insulate and cushion while reducing the amount of caulk needed to fill or seal large openings. Use to back fill large gaps before applying caulk (caulk sold separately). Helps insulate and cushion while reducing the amount of caulk needed to fill or seal large openings.
  • Suitable for use with pavement, cracks, wall joints and foundations
  • Compatible with most caulks and sealants
  • Made of resilient, closed-cell poly foam for durability
  • Saves on the amount of caulk needed to fill cracks
  • Saves time and energy
  • Saves money
  • Click here to learn more about Eco Options and Energy Efficiency

Info & Guides

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Name1 in. x 13 ft. Black Expandable Foam WeatherstripE/O 3/8 in. Dia x 350 ft. Contractor Pack Caulk Backer Rod1/2 in. x 250 ft. Grey Poly Foam Caulk Saver Contractor Pack3/8 in. x 200 ft. All-Climate D-strip Weather Strip
Price
$1598
$2678
$3083
$4947
/roll
Ratings
(67)
(47)
(2)
(1)
MaterialPolyurethane FoamPolyethylenePVCOther
Builders Hardware Product TypeFoam TapeFoam TapeFoam TapeFoam Tape
Unspooled Length (ft.)13350250200
View ProductView ProductView ProductView Product

Specifications

Dimensions

Product Depth (in.)
4200 in
Product Height (in.)
.375 in
Product Width (in.)
.375 in
Unspooled Length (ft.)
350

Details

Builders Hardware Product Type
Foam Tape
Color Family
Grays
Color/Finish
Gray
Density
2.0
Material
Polyethylene
Returnable
180-Day

Warranty / Certifications

Manufacturer Warranty
90 Days

Questions & Answers

7Questions16Answers

i have 29784 lf of backer Rod, How much it will be

Asked by David November 9, 2020
0
Answers

Can this be used before caulking in between the exterior logs of a cedar cabin?

Asked by OurlogCabin October 28, 2020
2
Answers

I don't see why it wouldn't work for that. It's just a closed cell foam and has held up fine under concrete expansion joint filler in my driveway.

Can this be used before caulking between the exterior logs of a cabin?

Asked by OurlogCabin October 28, 2020
1
Answer

Yes it can.

Is there some reason no one bothers to answer questions about this product? I would also like to ...

Asked by Wondering August 22, 2020
2
Answers

Yes it’s compressible. I recently installed Pergo Outlast laminate in my whole home. Placed over 100 year old hardwood floors that were damaged beyond repair. Used this as fill-in around the entire perimeter. Saved me a fortune in silicone caulk as only a small amount was needed to seal. 1-2 tubes of silicone per room compared to 6-8 tubes without the backer rod.

is it heat resistant? I was going to use it as a backer to Crack-Stix. a concrete crack filler t...

Asked by scott May 27, 2019
2
Answers

No, intended use is as backer for self leveling, elastomerics such as Sika Crack Flex Sealant, etc.

Pergo laminate flooring requires a compressible foam around perimeter. Does this foam compress?

Asked by Jay August 30, 2018
5
Answers

Yes, it's a soft foam rod.

Is this product compressible enough to be suited for use with installing pergo outlast laminate flooring?

Asked by Brian May 16, 2018
4
Answers

It absolutely works for the required 3/8" our manufacturer recommends for laminate flooring.

Customer Reviews

  • 4.6
    out of 47 reviews
  • 83% recommend this product
5star-icon34
4star-icon8
3star-icon3
2star-icon1
1star-icon1
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Showing 1-10 of 47 reviews
We used this product during the floating floor installation in our upstairs bathroom. It provide...
We used this product during the floating floor installation in our upstairs bathroom. It provided the necessary expansion joint of 3/8" at the wall joint. It also reduced the amount of caulking required to provide a waterproof joint. It was easily pressed into the gap between the floor and wall and cut with a putty knife.
by Itzy
1 person found this helpful
wrong size
Box was mislabeled with incorrect size. I needed 3/8 inch and after I struggled with about 10 feet of the backer rod before realizing it wasn't me who measured wrong but that I was sold the wrong product as the original label shows 1/2 inch. Another home depot return.
by And123
1 person found this helpful
It was inexpensive and easy to use....
It was inexpensive and easy to use.
by SUE
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
I bought this product to fill in the gaps around...
I bought this product to fill in the gaps around my exterior doors and window framing. I am hoping it will help with the nesting bugs and Geckos. I didn’t tuck it that far. I did have to return to the store to buy thicker one to fill in the larger gaps.this product squeeze into most spaces without a problem. I also used the product for around light fixtures. Now let’s see if the critters try eating it away, i hope not. Hawaii has some crazy bugs and Beatles. Wish me luck!
by Richard
worked ok in the gap around the windows...
worked ok in the gap around the windows
by wheel
The product works as expected....
The product works as expected.
by Brick
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by FRANK
by HomeDepotCustomer
Showing 1-10 of 47 reviews