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🛡️ Seal smart, live comfortable — the pro’s choice for flawless gaps!
The M-D Building Products Versatile Gray Foam Backer Rod is a 5/8 inch by 20-foot high-quality, weather-resistant foam designed to fill medium gaps and expansion joints. It provides a durable, waterproof base for caulking, enhancing seal longevity and preventing drafts and dust infiltration. Easy to trim and install, it’s perfect for both indoor and outdoor use, making it an essential tool for professional-grade sealing and insulation projects.
| ASIN | B000BQP1D4 |
| Best Sellers Rank | #49,808 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #180 in Hardware Sealers |
| Brand | M-D Building Products |
| Brand Name | M-D Building Products |
| Color | Gray |
| Customer Reviews | 4.7 out of 5 stars 1,615 Reviews |
| Global Trade Identification Number | 00043374715064 |
| Included Components | MD Building - 71506 |
| Item Form | Foam |
| Item Type Name | MD Building - 71506 |
| Item Weight | 1.76 ounces |
| Manufacturer | M-D Building Products |
| Material Type | Plastic |
| Model | MD Building - 71506 |
| Number of Items | 1 |
| Part Number | 71506 |
| Surface Recommendation | surface_recommendation |
| UPC | 043374715064 |
| Unit Count | 1.0 Count |
| Warranty Description | Warranty |
| Water Resistance Level | Waterproof |
M**L
good quality, good service
I ended up ordering the wrong size for my project and had to return. However, the backer rod seems to be made of high-quality foam, and it feels dense and durable. It has a nice, consistent texture that should be great for filling gaps and joints. I can't speak to how well it works in the long term, but it appears sturdy and like it would do the job as intended. While I didn't end up using the backer rod, Amazon's return service made the process incredibly easy and the refund was instant.
C**A
Good product
Works very well for what I need.
M**Y
Great price.
Works great!
C**Y
generic fit
Very effective for covering gaps. Covers up easily.
C**B
Solid foam backer road
As advertised and affordable. Cuts easy, very flexible, accurate dimensions. Using as backer rod and insulator around patio sliding doors and in driveway. It was nice to find a brand who has a thicker dimension in 5/8 that I needed.
P**J
Window Seal For Power Cord
Would buy again. Used for running generator power cord under window in order to seal from cold/hot wind.
S**M
Great product !
Great product used it to put down in my tack room when I put a wood floor down. Worked perfect to keep the boards in place and still have them the expansion gap they needed!
J**S
Just right snugness
This 5/8" backer rod was a good fit in the 1/2"expansion joint. First the old fiber board joint was raked out. The joint was the pressure washed followed by final cleaning with a leaf blower. This size backer rod is a perfect fit. It is easy to press it in about a 1/2" below the concrete surface. Finger work well to press it in. A box knife with the blade retracted gives a nice even depth. Masking tape was used on either side of the gap to have a clean look joint. Five 10 oz cartridges of Sikaflex 1cSL Flexible Self Leveling Polyurethane Concrete Expansion Joint and Crack Sealant filled the 1/2" x 1/2" X 35' gap. If there is wind and blowing leaves/debris, the joint should be covered until sealant gets a skin
Y**E
it Works
Good
N**M
Perfect ……
Recommended for purpose and was perfect
G**Y
Excellent Product
Excellent Product ... Works as Intended
L**E
Comme j'ai demandé
Parfait
M**S
Worked really well.
Worked really well. Used it in a space over an entrance door. Applied caulking over the top with a putty knife. Perfect result.
Trustpilot
1 week ago
4 days ago