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)
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.
Specifications
| Manufacturer | M-D Building Products |
| Part Number | 71464 |
| Item Weight | 0.6 ounces |
| Product Dimensions | 14 x 8 x 2 inches |
| Country of Origin | China |
| Item model number | 71464 |
| Is Discontinued By Manufacturer | No |
| Size | 20 Ft. |
| Color | Black |
| Style | Backer Rod |
| Material | Rubber |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Measurement System | US |
| Certification | Non-absorbent, closed-cell polyethylene pre-caulking material |
| Included Components | MD Building - 71464 - 2pk |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | All 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. |
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Reviews
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
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