--- product_id: 146700517 title: "M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray" brand: "m-d building products" price: "2076371₫" currency: VND in_stock: true reviews_count: 6 category: "M D Building Products" url: https://www.desertcart.vn/products/146700517-m-d-building-products-71464-backer-rod-for-gaps-joints store_origin: VN region: Vietnam --- # Easily trimmed to fit any joint size Weather-resistant for indoor/outdoor use 3/8-inch diameter for medium gaps M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray **Brand:** m-d building products **Price:** 2076371₫ **Availability:** ✅ In Stock ## Summary > 🔧 Seal smart, live comfortable — don’t let gaps steal your comfort! ## Quick Answers - **What is this?** M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray by m-d building products - **How much does it cost?** 2076371₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/146700517-m-d-building-products-71464-backer-rod-for-gaps-joints) ## 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 - • **Effortless Custom Fit:** Trim or twist to size for a seamless, professional finish every time - • **Precision Gap Filling:** Perfect 3/8-inch thickness seals medium gaps flawlessly - • **Versatile Application:** Ideal for doors, windows, driveways, and more—your all-in-one sealing solution - • **All-Weather Durability:** Built to withstand rain, sun, and temperature swings without losing integrity - • **Quick & Clean Installation:** Push in place and caulk over—no messy adhesives or tools required ## Overview The M-D Building Products 71464 Backer Rod is a 3/8-inch diameter, 20-foot long gray foam rod designed to fill medium-sized gaps and joints. Made from durable, weather-resistant rubber, silicone, and vinyl materials, it provides a reliable base for caulking, enhancing insulation and draft prevention for both indoor and outdoor applications. Easy to trim and install, it’s the go-to solution for professionals and DIYers aiming for a clean, long-lasting seal. ## Description M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray Review: Great for posting my Dobermans ears thanks x - Great for posting my Dobermans ears thanks x Review: Good low cost back rod - Used this foam to seal up the concrete around my 4inch pipe for Radon System before I caulked. I stuffed this around the pipe to fill in the gap and then covered it all with high quality caulk to seal it up perfectly. It worked perfectly and is far cheaper than what i found at my Home Center. Make sure to purchase a thickness that is a little wider than your gap so it make a tight fit. ## 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 | B000BQS90G | | Best Sellers Rank | 791,858 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,243 in Watering Cans 6,342 in Sealers 47,144 in Fishing (Sports & Outdoors) | | Brand | M-D Building Products | | Colour | Gray | | Customer Reviews | 4.6 out of 5 stars 1,550 Reviews | | Global Trade Identification Number | 00043374714647 | | Included Components | MD Building - 71464 - 2pk | | Item Form | Foam | | Item Type Name | MD Building - 71464 - 2pk | | Item Weight | 0.6 Ounces | | Item form | Foam | | Item weight | 0.6 Ounces | | Manufacturer | M-D Building Products | | Manufacturer Part Number | 71464 | | Material | Rubber, Silicone, Vinyl | | Model Number | 71464 | | Number of Items | 1 | | Number of items | 1 | | Surface Recommendation | Door, Window | | Surface recommendation | Door, Window | | UPC | 043374714647 | | Unit Count | 1.0 count | ## Product Details - **Brand:** M-D Building Products - **Colour:** Gray - **Item form:** Foam - **Item weight:** 0.6 Ounces - **Surface recommendation:** Door, Window ## Images ![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 1](https://m.media-amazon.com/images/I/61bhNB8Z9UL.jpg) ![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 2](https://m.media-amazon.com/images/I/71glyJQDg0L.jpg) ![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 3](https://m.media-amazon.com/images/I/818J6gOM3ZL.jpg) ![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 4](https://m.media-amazon.com/images/I/81Py1S2524L.jpg) ![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 5](https://m.media-amazon.com/images/I/81-xBTntOuL.jpg) ## Questions & Answers **Q: how many feet come in a 3 pk?** A: Both INDIVIDUAL packs - the 3/8" and the 1/2"- are 20 feet long. **Q: no 1/4" one? either 20 or 50ft?** A: Not in this brand, but Amazon offers 1/4-inch backer rod in various lengths, from 10 feet to 100 feet, from other brands. Just search on "Backer Rod 1/4 Inch". **Q: can the backer rod be sliced for smaller openings?** A: I have not done that, but it cuts easily with a sharp knife or scissors, so you should be able to slice it to fit whatever opening you have. It's good stuff! **Q: Can his be used for exterior windows before caulking?** A: I used it to push into larger cracks in my driveway before applying concrete filler, and it worked great. I'm thinking that it should work well for filling in spaces around your windows prior to caulking. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great for posting my Dobermans ears thanks x *by B***S on 30 September 2023* Great for posting my Dobermans ears thanks x ### ⭐⭐⭐⭐⭐ Good low cost back rod *by U***T on 8 April 2026* Used this foam to seal up the concrete around my 4inch pipe for Radon System before I caulked. I stuffed this around the pipe to fill in the gap and then covered it all with high quality caulk to seal it up perfectly. It worked perfectly and is far cheaper than what i found at my Home Center. Make sure to purchase a thickness that is a little wider than your gap so it make a tight fit. ### ⭐⭐⭐⭐⭐ Use THESE, not spray foam *by M***Y on 24 October 2025* Sometimes caulking or spray foam is not appropriate for the job, and is an excellent permanent base fix prior to caulking. Creates no pressure on door and window frames ## Frequently Bought Together - 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 - Versatile Gray Foam Backer Rod Set 1/2in x 20ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71480) - Sikaflex Self Leveling Sealant, Gray, polyurethane with an accelerated curing capacity for sealing horizontal expansion joints in concrete, 10.1 fl. oz Cartridge --- ## 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.vn/products/146700517-m-d-building-products-71464-backer-rod-for-gaps-joints](https://www.desertcart.vn/products/146700517-m-d-building-products-71464-backer-rod-for-gaps-joints) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-06-05*