--- product_id: 51559533 title: "M-D Building Products 20 ft Foam Large 71506 Backer Rod for Gaps and Joints, 5/8-by-20 Feet, Gray, Black, 5/8\" x 20'" brand: "m-d building products" price: "664.47 DT" currency: TND in_stock: true reviews_count: 6 category: "M D Building Products" url: https://www.desertcart.tn/products/51559533-m-d-building-products-20-ft-foam-large-71506-backer store_origin: TN region: Tunisia --- # Easily trim to fit any gap size Waterproof & weather-resistant 20 ft length for extensive coverage M-D Building Products 20 ft Foam Large 71506 Backer Rod for Gaps and Joints, 5/8-by-20 Feet, Gray, Black, 5/8" x 20' **Brand:** m-d building products **Price:** 664.47 DT **Availability:** ✅ In Stock ## Summary > 🔧 Seal Smart, Live Comfortable — The Ultimate Gap Solution ## Quick Answers - **What is this?** M-D Building Products 20 ft Foam Large 71506 Backer Rod for Gaps and Joints, 5/8-by-20 Feet, Gray, Black, 5/8" x 20' by m-d building products - **How much does it cost?** 664.47 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/51559533-m-d-building-products-20-ft-foam-large-71506-backer) ## Best For - m-d building products enthusiasts ## Why This Product - Trusted m-d building products brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Gap Mastery:** Effortlessly fills and seals medium gaps up to 5/8", blocking drafts and dust for year-round comfort. - • **Trusted by Thousands:** With a 4.6-star rating from over 1,400 reviews, join the savvy pros who rely on M-D Building Products for lasting results. - • **Versatile Home Armor:** Ideal for doors, windows, driveways, and sidewalks, it enhances insulation and damp-proofing across your living spaces. - • **Precision Fit, Zero Fuss:** Simply push into joints and trim with scissors—no adhesives or messy sealants needed for a flawless finish. - • **Built to Brave the Elements:** Crafted from durable rubber vinyl silicone, this backer rod withstands rain, wind, and sun without losing integrity. ## Overview The M-D Building Products 20 ft Foam Backer Rod is a high-quality, waterproof gap filler designed for medium-sized joints. Made from durable rubber vinyl silicone, it provides a reliable base for caulking, improves insulation, and prevents drafts and dust infiltration. Easy to install and trim, it’s perfect for both indoor and outdoor use, ensuring long-lasting weather resistance and enhanced home comfort. ## Description M-D Building Products 71506 Backer Rod For Gaps and Joints, 5/8-by-20 Feet, Gray Review: Perfect …… - Recommended for purpose and was perfect Review: it Works - Good ## Features - Quality Construction: This gap filler is made from high-quality, weather-resistant materials, ensuring long-lasting durability and performance. It effectively seals medium gaps between surfaces, preventing drafts and dust from entering your home. Suitable for both indoor and outdoor use, it withstands various weather conditions, providing consistent protection and improved comfort. - Concrete Gap Filling Excellence: Our product excels in filling concrete gaps, creating a strong foundation for caulking projects. Utilize this foam to effectively fill joints between surfaces, ensuring dependable adhesion for caulking applications that promise enduring durability and resilience. - Complete Gap Solution: This product provides versatile gap filling, preventing drafts and offering a sturdy base for caulking. Perfect for expansion joints in driveways and sidewalks, it can be twisted for larger gaps and easily trimmed with scissors to the desired size. - Effortless Installation: Enjoy a hassle-free setup by effortlessly pushing the backer rod into most joint openings until it fits snugly. Once installed, enhance the seal further by applying caulk on top—no need for messy sealants or adhesives. - Versatile Application: From repairing leaky roofs and window sills to addressing drafty doors, the Backer Rod is your go-to solution! Beyond sealing surface gaps, it excels in insulating, enhancing airtightness, and damp-proofing your home—offering multifaceted benefits for various household needs. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000BQP1D4 | | Best Sellers Rank | 695,986 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,269 in Weather Stripping | | Brand | M-D Building Products | | Colour | Black | | Customer Reviews | 4.6 out of 5 stars 1,415 Reviews | | Global Trade Identification Number | 00043374715064 | | Included Components | 1 Foam Backer Rod Roll | | Item Form | Strip | | Item Type Name | M-D Building Products 71506 Backer Rod For Gaps and Joints, 5/8-by-20 Feet, Gray | | Item Weight | 0.11 Pounds | | Item form | Strip | | Item weight | 0.11 Pounds | | Manufacturer | M-D Building Products | | Manufacturer Part Number | 71506 | | Material | Rubber Vinyl Silicone | | Model Number | MD Building - 71506 | | Number of Items | 1 | | Surface Recommendation | Door | | Surface recommendation | Door | | UPC | 043374715064 | | Unit Count | 20.0 meter | | Water Resistance Level | Waterproof | | Water resistance level | Waterproof | ## Product Details - **Brand:** M-D Building Products - **Colour:** Black - **Item form:** Strip - **Item weight:** 50 g - **Surface recommendation:** Door ## Images ![M-D Building Products 20 ft Foam Large 71506 Backer Rod for Gaps and Joints, 5/8-by-20 Feet, Gray, Black, 5/8" x 20' - Image 1](https://m.media-amazon.com/images/I/61HHJ4QXlvL.jpg) ![M-D Building Products 20 ft Foam Large 71506 Backer Rod for Gaps and Joints, 5/8-by-20 Feet, Gray, Black, 5/8" x 20' - Image 2](https://m.media-amazon.com/images/I/81SA6HZLHaL.jpg) ![M-D Building Products 20 ft Foam Large 71506 Backer Rod for Gaps and Joints, 5/8-by-20 Feet, Gray, Black, 5/8" x 20' - Image 3](https://m.media-amazon.com/images/I/818J6gOM3ZL.jpg) ![M-D Building Products 20 ft Foam Large 71506 Backer Rod for Gaps and Joints, 5/8-by-20 Feet, Gray, Black, 5/8" x 20' - Image 4](https://m.media-amazon.com/images/I/81Py1S2524L.jpg) ![M-D Building Products 20 ft Foam Large 71506 Backer Rod for Gaps and Joints, 5/8-by-20 Feet, Gray, Black, 5/8" x 20' - Image 5](https://m.media-amazon.com/images/I/81-xBTntOuL.jpg) ## Questions & Answers **Q: This will seem like a bizarre question, but does it smell? (Like the majority of Chinese-made closed cell foam materials.)** A: I use it for taxidermy purposes and havent noticed any smell. **Q: Is product gray or black?** A: Mine was Gray... **Q: Can i use that to repair my garage floor cracks with the concrete caulk?** A: I wouldn’t. It’s just foam. If the crack is huge I would use sand as a filler and apply a deep layer of concrete patch **Q: does this break down or come apart easily when wet?** A: No. Its foam.. it doesnt break down at all ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect …… *by N***M on 3 April 2022* Recommended for purpose and was perfect ### ⭐⭐⭐⭐⭐ it Works *by Y***E on 30 November 2025* Good ### ⭐⭐⭐⭐⭐ good quality, good service *by M***L on 9 November 2024* 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. ## Frequently Bought Together - M-D Building Products - Versatile Gray Foam Backer Rod - Set 5/8in x 20ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71506) - 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) - M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/51559533-m-d-building-products-20-ft-foam-large-71506-backer](https://www.desertcart.tn/products/51559533-m-d-building-products-20-ft-foam-large-71506-backer) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-11*