--- product_id: 77420348 title: "M-d Products .50in. X 20ft. Backer Rod For Gaps & Joints 71480" brand: "m-d building products" price: "AR$100693" currency: ARS in_stock: true reviews_count: 5 category: "M D Building Products" url: https://www.desertcart.com.ar/products/77420348-m-d-products-50in-x-20ft-backer-rod-for-gaps store_origin: AR region: Argentina --- # Closed-cell, non-absorbent polyethylene 20 ft. length for extended coverage 0.5 in. max gap fill M-d Products .50in. X 20ft. Backer Rod For Gaps & Joints 71480 **Brand:** m-d building products **Price:** AR$100693 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal smart, save big—because your projects deserve the pro touch! ## Quick Answers - **What is this?** M-d Products .50in. X 20ft. Backer Rod For Gaps & Joints 71480 by m-d building products - **How much does it cost?** AR$100693 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/77420348-m-d-products-50in-x-20ft-backer-rod-for-gaps) ## 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 - • **Extended Reach:** Generous 20-foot length ensures you cover large projects without constant replacements. - • **Pest & Energy Shield:** Creates a tight seal that blocks pests and improves insulation, saving you money and hassle. - • **Precision Gap Filler:** Perfectly sized 0.5-inch diameter to seal cracks and joints with professional accuracy. - • **Durable & Water Resistant:** Closed-cell polyethylene resists moisture and prevents damage, keeping your work pristine. - • **Easy Multi-Strand Flexibility:** Twist multiple rods together to customize fill for wider gaps—no compromises on fit. ## Overview M-D Products .50in. x 20ft Backer Rod is a high-performance, closed-cell polyethylene foam designed to fill and insulate gaps in pavement cracks, wall joints, foundations, sidewalks, and driveways. Its non-absorbent, water-resistant material prevents moisture intrusion and pest entry, while the flexible design allows multiple strands to be twisted for larger gaps. Ideal for professional-grade weatherization and finishing, this 20-foot gray rod ensures durable, efficient sealing that enhances both protection and energy savings. ## Description Before caulking use the Caulk Backer Rod to help fill gaps and openings in pavement cracks wall joints foundations sidewalks and driveways. The backer rod helps cushion and insulate and helps prevent 3-point bonding.Features. Fills gaps and openings in pavement cracks wall joints foundations sidewalks and driveways.. Non-absorbent closed-cell polyethylene pre-caulking material.. Twist multiple strands together to fill large cracks gaps.. Gray finish.. Size - 0.5 in. x 20 ft. Review: Cost is too much.. Similar products are available in lowest prices.. Review: Excellent to use. Easy to install and does save on caulk. Keeps pests out! ## Features - Fills gaps and openings in pavement cracks, wall joints, foundations, sidewalks and driveways. - Non-absorbent, closed-cell polyethylene pre-caulking material. - Twist multiple strands together to fill large cracks, gaps. - Gray finish. - Size - 0.5 in. x 20 ft. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000BQWOC0 | | Best Sellers Rank | 563,837 in Beauty ( See Top 100 in Beauty ) 5,725 in Body Oils | | Brand | M-D Building Products | | Colour | Gray | | Customer Reviews | 4.6 4.6 out of 5 stars (3,697) | | Global Trade Identification Number | 00043374714807 | | Item Form | Paste | | Item Weight | 9 g | | Manufacturer | M D Building Products | | Material | Polyethylene (PE) | | Maximum Gap Fill | 0.5 Inches | | Surface Recommendation | wall | | UPC | 043374714807 | | Unit Count | 1.0 count | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** M-D Building Products - **Colour:** Gray - **Item form:** Paste - **Item weight:** 9 g - **Maximum gap fill:** 0.5 Inches ## Images ![M-d Products .50in. X 20ft. Backer Rod For Gaps & Joints 71480 - Image 1](https://m.media-amazon.com/images/I/61UnawlcwQL.jpg) ![M-d Products .50in. X 20ft. Backer Rod For Gaps & Joints 71480 - Image 2](https://m.media-amazon.com/images/I/81JSrbnZQ5L.jpg) ![M-d Products .50in. X 20ft. Backer Rod For Gaps & Joints 71480 - Image 3](https://m.media-amazon.com/images/I/818J6gOM3ZL.jpg) ![M-d Products .50in. X 20ft. Backer Rod For Gaps & Joints 71480 - Image 4](https://m.media-amazon.com/images/I/81Py1S2524L.jpg) ![M-d Products .50in. X 20ft. Backer Rod For Gaps & Joints 71480 - Image 5](https://m.media-amazon.com/images/I/81-xBTntOuL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is it safe to use near hot water baseboard radiators? I want to use it behind radiator cover as a temporary fix for a cold draft.** A: I suspect it would be safe if between the wall and the top cover of the baseboard, assuming you have standard baseboard covers like mine -- which never get super hot. It's foam, and will likely melt if too close to a heat source. To be on the safe side, I'd suggest first contacting the company directly. **Q: Can you use barge glue and plastidip** A: Call the manufacturer **Q: I live in an apartment and i feel a draft coming through the cracks of my window would this help? Im trying to avoid using weather tape** A: I purchased the medium backer rod and they are 1/2" thick. I think the one I purchased would be too thick to insert into the crack of your windows. Maybe there is a smaller version that would work for you. **Q: What caulking do u need for this ?** A: I did use caulk as it was used to support a garage door seal as the bottom of the door. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***I on 23 November 2018* Cost is too much.. Similar products are available in lowest prices.. ### ⭐⭐⭐⭐⭐ Review *by A***I on 27 February 2026* Excellent to use. Easy to install and does save on caulk. Keeps pests out! ### ⭐⭐⭐⭐⭐ Review *by N***I on 31 December 2024* I’ve been using very thin backer rod for posting my dog’s ears, and it’s been a fantastic solution! It’s lightweight, flexible, and provides just the right amount of support without causing any discomfort. It’s easy to cut to size and stays in place securely. Plus, it’s gentle on the ears and works perfectly with sports tape. Highly recommend for anyone looking for a reliable and comfortable ear-posting method! ## Frequently Bought Together - 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) - 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) - 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.com.ar/products/77420348-m-d-products-50in-x-20ft-backer-rod-for-gaps](https://www.desertcart.com.ar/products/77420348-m-d-products-50in-x-20ft-backer-rod-for-gaps) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-23*