--- 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' | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor" brand: "m-d building products" price: "€ 47.85" currency: EUR in_stock: true reviews_count: 6 url: https://www.desertcart.com.cy/products/51559533-m-d-building-products-20-ft-foam-large-71506-backer store_origin: CY region: Cyprus --- # 5/8" thickness for perfect gap fit Easily trims with scissors Waterproof closed-cell foam 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' | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor **Brand:** m-d building products **Price:** € 47.85 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal smart, save energy, and stay ahead of the weather! ## 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' | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor by m-d building products - **How much does it cost?** € 47.85 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/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 - • **Versatile Application:** Ideal for doors, windows, driveways, and expansion joints—your all-in-one gap solution. - • **Weatherproof Durability:** Closed-cell foam resists moisture, dust, and insects—indoors or out. - • **Draft & Moisture Blocker:** Seals gaps to enhance home comfort and energy efficiency. - • **Effortless Customization:** Trim to size with scissors for a perfect, mess-free installation. - • **Precision Fit Every Time:** 5/8" diameter ensures snug, reliable sealing for medium gaps. ## Overview The M-D Building Products 71506 Backer Rod is a 20-foot, 5/8-inch thick closed-cell foam strip designed to fill and seal medium gaps and joints. Waterproof and weather-resistant, it prevents drafts, moisture, dust, and insects from entering your home. Easy to cut and install, it provides a durable base for caulking in both indoor and outdoor applications, enhancing insulation and energy efficiency. ## Description M-D Building Products 71506 Backer Rod For Gaps and Joints, 5/8-by-20 Feet, Gray ## 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 | 749,449 in DIY & Tools (See Top 100 in DIY & Tools) 1,369 in Weather Stripping | | Brand | M-D Building Products | | Colour | Black | | Customer Reviews | 4.6 4.6 out of 5 stars (1,359) 4.6 out of 5 stars | | 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 | 50 g | | 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 | | Unit Count | 20.0 meter | | Upc | 043374715064 | | 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' | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor - 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' | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor - 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' | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor - 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' | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor - 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' | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor - Image 5](https://m.media-amazon.com/images/I/81-xBTntOuL.jpg) ## Available Options This product comes in different **Colour Name** options. ## 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 on Reviewed in the United Kingdom 3 April 2022* Recommended for purpose and was perfect ### ⭐⭐⭐⭐⭐ Backer rod for gaps *by on Reviewed in Canada 7 March 2021* I use this when I reline up cycled jewelry boxes, it works great for the ring rolls. ### ⭐⭐⭐⭐⭐ it Works *by on Reviewed in Canada 30 November 2025* Good ## 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.com.cy/products/51559533-m-d-building-products-20-ft-foam-large-71506-backer](https://www.desertcart.com.cy/products/51559533-m-d-building-products-20-ft-foam-large-71506-backer) --- *Product available on Desertcart Cyprus* *Store origin: CY* *Last updated: 2026-08-28*