M-D Building Products - Versatile Gray Foam Backer Rod - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling, 3/8 by 20 Feet, (Pack of 2) (71464)
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M-D Building Products - Versatile Gray Foam Backer Rod - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling, 3/8 by 20 Feet, (Pack of 2) (71464)

4.6/5
Product ID: 5587474
Secure Transaction
12 interest-free installments with tabby
✂️Easily trim to size for custom sealing
🌦️Weather-resistant for indoor/outdoor use
🛠️3/8 inch diameter for perfect gap fit

Description

🛡️ Seal smart, save energy, and upgrade your space effortlessly!

  • PRECISION GAP FILLER - Seals medium concrete gaps with exact 3/8" foam diameter for flawless caulking adhesion.
  • ALL WEATHER DURABILITY - Crafted from premium weather-resistant rubber to withstand rain, sun, and temperature swings without losing integrity.
  • EFFORTLESS CUSTOMIZATION - Trim or twist the foam backer rod to perfectly fit any joint size—no special tools required.
  • HASSLE FREE INSTALLATION - Simply push into gaps and apply caulk on top—no messy adhesives or complicated prep needed.
  • VERSATILE HOME PROTECTION - Ideal for sealing expansion joints, drafty doors, window sills, and even leaky roofs to boost insulation and airtightness.

The M-D Building Products Versatile Gray Foam Backer Rod is a 3/8" diameter, 20-foot long, weather-resistant rubber foam designed to fill and seal medium concrete gaps and expansion joints. Its closed-cell polyethylene construction ensures durability and non-absorbency, making it perfect for both indoor and outdoor use. Easy to trim and install, it provides a reliable base for caulking, enhancing insulation, airtightness, and protection against drafts and moisture.

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Specifications

ManufacturerM-D Building Products
Part Number71464
Item Weight0.6 ounces
Product Dimensions14 x 8 x 2 inches
Country of OriginChina
Item model number71464
Is Discontinued By ManufacturerNo
Size20 Ft.
ColorBlack
StyleBacker Rod
MaterialRubber
Item Package Quantity1
Number Of Pieces1
Measurement SystemUS
CertificationNon-absorbent, closed-cell polyethylene pre-caulking material
Included ComponentsMD Building - 71464 - 2pk
Batteries Included?No
Batteries Required?No
Warranty DescriptionAll M-D products are warranted to be free from defects in material and workmanship if installed and used in strict accordance with our installation instructions. Our liability is limited to our sale price of any products proved to be defective or, at our option, to the replacement of such products upon their return to us.

Have a Question? See What Others Asked

how many feet come in a 3 pk?
no 1/4" one? either 20 or 50ft?
can the backer rod be sliced for smaller openings?
Can his be used for exterior windows before caulking?

Reviews

4.6

All from verified purchases

L**D

Perfect for small spaces

Perfect for small spaces!!

1**N

Stops Drafts

It's just a roll of foam, too limber for my application.

G**Y

Worked

As advertized

W**M

bill

nice

J**E

nic backer rod

A good filler for wider spaces between two panels that saves caullk/ adnesive/ sealiant. I am using this backer in some spaces between sheetrock and flooring to liquid proof them. Also good to keep critters out.

K**.

Good product

Works well. I bought it to fill in gaps in my driveway. For the smaller cracks I cut the width of it. It is durable and a good price.

K**N

Very fast shipping, and was exactly as ordered.

Great product, made sealing our driveway a breeze!

B**E

Great for threshold gaps

Had a small gap in my front door threshold after one of our animals ripped up the material that was originally in the gap.After reading many reviews for this product, gave it a shot. It was just what I needed! Super easy to use: measure, cut, install. Fits perfectly in the gap. No need to worry about dirt, bugs, and other debris getting in the gap.Great value too, as the 20ft bag was only about $3.00, with plenty left over if I need to replace it again.Highly recommend.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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UAEstore
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30 daysfor PRO membership users

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Secure Transaction
12 interest-free installments with tabby

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

M D Building Products Versatile Gray Foam Backer Rod Essential | Desertcart UAE