M-D Building Products 71550 350 ft. Gray Foam Backer Rod for Small 3/8 in. Gaps and Joints
M-D Building Products 71550 350 ft. Gray Foam Backer Rod for Small 3/8 in. Gaps and Joints
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M-D Building Products

M-D Building Products 71550 350 ft. Gray Foam Backer Rod for Small 3/8 in. Gaps and Joints

4.6 stars out of 31 reviews
(4.6)|
31 ratings
M-D Building Products 71550 350 ft. Gray Foam Backer Rod for Small 3/8 in. Gaps and JointsM D Building Products 71550 350 ft Gray Foam Backer Rod for Small 3 8 in Gaps and JointsM D Building Products 38384 20 ft Gray Foam Backer Rod for Ex Large 3 4 in Gaps and JointsM D Building Products 71551 250 ft Gray Foam Backer Rod for Medium 1 2 in Gaps and JointsM D Building Products 19101 15 ft Gray Foam Backer Rod for Ex Large 3 4 in Gaps and JointsM D Building Products 71506 20 ft Gray Foam Backer Rod for Large 5 8 in Gaps and JointsM D Building Products 19100 10 ft Gray Foam Backer Rod for XX Large 1 in Gaps and JointsM D Building Products 1 2 in Gray Foam Backer RodM D Building Products 71552 150 ft Gray Foam Backer Rod for Large 5 8 in Gaps and JointsM D Building Products 71464 20 ft Gray Foam Backer Rod for Small 3 8 in Gaps and Joints
Size:350 ft. for 3/8 in. Gaps-Out of stock
10', Now $9.99, was $12.33
$12.33
15 ft. for 3/4 in. Gaps, $14.99
Other options
20 ft. for 1/2 in. Gaps, $9.80
20 ft. for 3/4 in. Gaps, $17.32
20 ft. for 3/8 in. Gaps, Now $9.45, was $12.99
Other options
20 ft. for 5/8 in. Gaps, $8.99
150 ft. for 5/8 in. Gaps, $38.74
250 ft. for 1/2 in. Gaps, $63.99
Other options
selected, 350 ft. for 3/8 in. Gaps, Now $32.16, was $52.50, Out of stock
$52.50

Key item features

  • Durable Material: Constructed from closed-cell foam, this backer rod offers a resilient and effective solution for various sealing needs.
  • Efficient Caulk Base: Designed to fill the empty space within large cracks and deeper joints, it significantly reduces caulk waste by providing a solid base for application.
  • Generous Dimensions: Measuring 350 feet in length and 3/8 inches in width, it is suitable for small gaps and joints, offering ample material for multiple projects.
  • Versatile Application: This gray foam backer rod is suitable for both indoor and outdoor use, providing flexibility for a wide range of sealing tasks.
  • Protective Barrier: Beyond caulk support, it effectively fills gaps to protect against drafts, moisture, dust, and insects, enhancing home comfort and integrity.
  • Simple Customization: Easily cut to the desired length using standard scissors, allowing for precise fitting in various gap sizes and configurations.
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Current price is Now $32.16
You save $20.34
was $52.50
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Selected option out of stock
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4.6 out of 5 stars
stars31 ratings22 reviews
How item rating is calculated
  1. 5 stars71% (22)
  2. 4 stars23% (7)
  3. 3 stars3% (1)
  4. 2 stars0% (0)
  5. 1 star3% (1)

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Showing 1-3 of 22 reviews

Jul 24, 2025
Carl
Top Reviewer
Item details
Size: 20 ft. for 5/8 in. Gaps
Sold and shipped byReliable Home Products
5 out of 5 stars review

Verified Purchase

Color matched the carpet perfectly. There was enough to fit both doorways.

Incentivized Review
Helpful?5G8JV0UA8WOE40745318
May 25, 2025
Kimberly
Top Reviewer
Item details
Size: 20 ft. for 5/8 in. Gaps
Sold and shipped byReliable Home Products
5 out of 5 stars review

Verified Purchase

we are using to put in cracks to keep cockroaches outside. seems to work pretty well so far. great product for the price.

Incentivized Review
Helpful?5G8JV0UA8WOE40745318
Dec 4, 2024
lttn
Item details
Size: 20 ft. for 1/2 in. Gaps
Sold and shipped byReliable Home Products
5 out of 5 stars review

Verified Purchase

perfect fit

Fit perfectly in the gap between my windowsill and window. Now my caulk will lay right. Definately would buy again if the need arises. Very easy to use.

Incentivized Review
Helpful?5G8JV0UA8WOE40745318