M-D Building Products - Versatile Gray Foam Backer Rod - Set 3/8in x 350ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71550)
Details
- ColorGray
- BrandM-D Building
- Item FormFoam
- Surface RecommendationDoor
- Water Resistance LevelWaterproof
Description
🛠️ Seal smart, save energy, and upgrade your space effortlessly!
- ENDLESS COVERAGE - 350ft roll means no mid-project interruptions—ideal for large-scale sealing jobs.
- PRECISION GAP FILLING - Perfect 3/8in thickness for medium gaps ensures airtight, dust-proof seals.
- EFFORTLESS INSTALLATION - Push-in design fits snugly with no adhesives needed—trim to size for custom fit.
- WEATHERPROOF DURABILITY - Crafted from premium foam that resists moisture and harsh outdoor elements.
- VERSATILE HOME PROTECTION - Seals concrete joints, expansion gaps, and cracks to boost insulation and comfort.
The M-D Building Products Versatile Gray Foam Backer Rod is a 3/8in diameter, 350ft long foam rod designed for sealing medium gaps in concrete, expansion joints, and cracks. Made from weather-resistant, waterproof foam, it provides a durable, airtight base for caulking both indoors and outdoors. Easy to install without adhesives, it enhances insulation, prevents drafts, and protects against moisture, making it an essential tool for professional-grade home sealing and energy efficiency.
Specifications
| Color | Gray |
| Brand | M-D Building Products |
| Item Form | Foam |
| Surface Recommendation | Door |
| Water Resistance Level | Waterproof |
| Number of Items | 1 |
| Manufacturer | M-D Building Products |
| UPC | 043374715507 |
| Global Trade Identification Number | 00043374715507 |
| Unit Count | 1.0 Count |
| Material | Foam |
| Part Number | 71550 |
| Item Weight | 14.4 ounces |
| Product Dimensions | 10 x 11 x 12 inches |
| Country of Origin | Mexico |
| Item model number | MD Building - 71550 |
| Size | 350 Ft. |
| Style | Backer Rod |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Included Components | MD Building - 71550 |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Warranty |
Reviews
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!
A**Y
Perfect for diy floor installation
We used this when installing engineered hardwood in our home. Functional, easy to use, and a great value. Would recommend!
W**M
bill
nice
J**L
This rod has my back!
Does what any good backer rod would! Works great and gets the job done.
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.
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.
L**A
Used in the bathroom and worked well
I cut these in half to make a half circle and then inserted them in between the drywall and subfloor to create a water tight seal along with caulking. I found that using the whole rod was too much and would prevent the baseboards from being installed flush with the flooring. I ended up returning half of them because I was able to cut the rod in half. Worked well and excellent.
Common Questions
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