--- product_id: 4877844 title: "MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps" brand: "m-d building products" price: "€ 19.01" currency: EUR in_stock: true category: "M D Building Products" url: https://www.desertcart.hr/products/4877844-md-building-foam-backer-rod-gray-1-2in-x-20ft store_origin: HR region: Croatia --- # 0.5in max gap fill Easy scissors cutting Waterproof & weather-resistant MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps **Brand:** m-d building products **Price:** € 19.01 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal with MD Building Foam — where precision meets protection! ## Quick Answers - **What is this?** MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps by m-d building products - **How much does it cost?** € 19.01 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/4877844-md-building-foam-backer-rod-gray-1-2in-x-20ft) ## 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 - • **Seal Like a Pro:** Closed-cell foam blocks drafts, moisture, dust, and insects for year-round comfort. - • **Cut to Fit, No Fuss:** Easily trims with scissors for a perfect, custom fit every time. - • **Versatile Gap Master:** Ideal for concrete joints, window sills, doors, and expansion gaps—your all-in-one weatherization hero. - • **Built to Last Outdoors:** Weather-resistant design ensures durability in any climate, indoor or outdoor. - • **Caulk Smarter, Not Harder:** Prevents caulk waste by providing a sturdy, reliable base for flawless sealing. ## Overview The MD Building Foam Backer Rod is a 1/2 inch by 20-foot closed-cell foam strip designed to fill medium gaps up to 0.5 inches. Its waterproof, weather-resistant material blocks drafts, moisture, dust, and insects, making it perfect for both indoor and outdoor use. Easy to cut with scissors and install, it provides a durable base that prevents caulk waste and enhances sealing performance across a variety of applications including concrete joints, window sills, and expansion gaps. ## Description desertcart.com: MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor : Industrial & Scientific ## 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 | B000BQWOC0 | | Best Sellers Rank | #1,711 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #17 in Weather Stripping | | Brand Name | M-D Building Products | | Color | Gray | | Customer Reviews | 4.6 4.6 out of 5 stars (5,324) | | Global Trade Identification Number | 00043374714807 | | Included Components | 1 Foam Backer Rod Roll | | Item Form | Specialty | | Item Type Name | Backer Rod | | Item Weight | 9.07 g | | Manufacturer | M-D Building Products | | Material Type | Foam | | Maximum Gap Fill | 0.5 inches | | Model | 71480 | | Number of Items | 1 | | Part Number | 71480 | | Surface Recommendation | wall | | UPC | 043374714807 | | Unit Count | 1 Count | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** M-D Building Products - **Color:** Gray - **Item Form:** Specialty - **Item Weight:** 9.07 g - **Maximum Gap Fill:** 0.5 inches ## Images ![MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps - Image 1](https://m.media-amazon.com/images/I/61UnawlcwQL.jpg) ![MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps - Image 2](https://m.media-amazon.com/images/I/81JSrbnZQ5L.jpg) ![MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps - Image 3](https://m.media-amazon.com/images/I/818J6gOM3ZL.jpg) ![MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps - Image 4](https://m.media-amazon.com/images/I/81Py1S2524L.jpg) ![MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps - 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. ## 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.hr/products/4877844-md-building-foam-backer-rod-gray-1-2in-x-20ft](https://www.desertcart.hr/products/4877844-md-building-foam-backer-rod-gray-1-2in-x-20ft) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-24*