--- product_id: 5175199 title: "EXPO4050 Series 4\" x50' Expansion Joint, No Size, No Color" brand: "reflectix" price: "VT19957" currency: VUV in_stock: true reviews_count: 8 category: "Reflectix" url: https://www.desertcart.vu/products/5175199-expo4050-series-4-x50-expansion-joint-no-size-no-color store_origin: VU region: Vanuatu --- # Waterproof foam material 4-inch expansion width 50-foot length for large projects EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color **Brand:** reflectix **Price:** VT19957 **Availability:** βœ… In Stock ## Summary > 🧱 Seal the gap, secure your space β€” expansion done right! ## Quick Answers - **What is this?** EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color by reflectix - **How much does it cost?** VT19957 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/5175199-expo4050-series-4-x50-expansion-joint-no-size-no-color) ## Best For - reflectix enthusiasts ## Why This Product - Trusted reflectix brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Extended Coverage:** 50 feet of durable foam ensures you’re ready for any project size. - β€’ **Trusted Brand Quality:** Reflectix reliability with a 4.4-star rating from 470+ pros. - β€’ **Waterproof Durability:** Built to withstand moisture, protecting your walls and surfaces. - β€’ **Effortless Installation:** Lightweight 1.1 lb foam that’s easy to handle and apply. - β€’ **Precision Expansion Control:** Seamlessly manage concrete joints with a reliable 4" width. ## Overview The Reflectix EXPO4050 Series Expansion Joint is a 4-inch wide, 50-foot long waterproof foam designed for concrete control joints and wall surface repairs. Lightweight and easy to install, it offers durable protection and precise gap filling, trusted by professionals with a strong 4.4-star rating. ## Description Reflectix EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color Review: Great product. - I had an idea to use this stuff between stone edging and the lawn. Helps space the grass from the stone a bit, making it easier to cut and edge. Review: Easy for this DIY! - Easy to work with and does what it is supposed to do. You need to be careful as the 1/2 inch perforation along the top tears off easily. ## Features - This Product Adds A Great Value - Product Is Highly Durable And Easy To Use - This Product Is Manufactured In China - Brand Name: Reflectix ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004WAPFS6 | | Best Sellers Rank | #31,992 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #138 in Wall Surface Repair Products | | Brand | Reflectix | | Brand Name | Reflectix | | Color | Black | | Customer Reviews | 4.3 out of 5 stars 484 Reviews | | Global Trade Identification Number | 00716511560017 | | Included Components | Appliance Parts & Accessories | | Item Form | Foam | | Item Type Name | 4"x50' Expansion Joint | | Item Weight | 1.1 Pounds | | Manufacturer | REFLECTIX INC | | Material Type | Plastic | | Maximum Gap Fill | 50 Inches | | Model | EXPO4050 | | Number of Items | 1 | | Part Number | EXPO4050 | | Surface Recommendation | Walls | | UPC | 716511560017 | | Unit Count | 1.0 Count | | Warranty Description | As labelled | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Reflectix - **Color:** Black - **Item Form:** Foam - **Item Weight:** 1.1 Pounds - **Maximum Gap Fill:** 50 Inches ## Images ![EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color - Image 1](https://m.media-amazon.com/images/I/616BNovop9L.jpg) ## Questions & Answers **Q: I have weeds cmg up bw my concrete slabs on driveway, do I just put this into the concrete joint gaps and then apply sikaflex on top? beginner here** A: I use this stuff between walls or bricks before the the pour. Then rip the perforated top off and fill with Urathane like sika. It allows movement of the slab and keeps things from breaking. If you have an existing joint, just buy the round foam and stuff it in leaving a space at the top. Be advised any self leveling compound will find even the smallest holes and all drain out. So if you don’t have a good deal use a little latex caulk then apply sika **Q: is this product good to use between concrete pool and paver decking** A: Yes, I used the Reflectix between a concrete wall and a paver driveway and it is working pretty well, I recommend to use a sealant(silicon)for outdoors at the top to prevent the dust cumulate in joints, the sealant should cover the joint with the pool, the top of the Reflectix and the joint with the paver decking. Hopefully it helps. **Q: Could this be used for a concrete form?** A: Not recommended, since it has limited strength and bends easily. I have used this around the edge of a sidewalk during resurfacing to prevent run off of cement and in some landscaping but not for any concrete forms. **Q: Is this product UV resistant?** A: If used correctly it is between two surfaces and not exposed to sunlight. It is made to go between a wall and a concrete sidewalk or as a filler in an expansion joint for example. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product. *by M***K on March 23, 2024* I had an idea to use this stuff between stone edging and the lawn. Helps space the grass from the stone a bit, making it easier to cut and edge. ### ⭐⭐⭐⭐⭐ Easy for this DIY! *by J***O on July 21, 2025* Easy to work with and does what it is supposed to do. You need to be careful as the 1/2 inch perforation along the top tears off easily. ### ⭐⭐⭐⭐ Great product but not perfect to refill current joint. *by V***U on November 20, 2013* This works great and easy to work with. The only issue with using this to replace rotten joint is that the gap between the concrete pads are usually slightly wider. If this product is about 3/16" or 1/4" thick, it will be perfect. It is easier to squeeze it in instead of leaving a gap in between. I end up have to cut a thin strip and squeeze near the top of the concrete gap to complete fill and secure this foam. I little be more work but it works. Let' see if it hold up. ## Frequently Bought Together - Reflectix EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color - Concrete Tools Set 3 PC Stainless Steel Flat Finishing Trowel (11" x 4") plus Concrete Edger (6" x 3", 1/2"R) and Groover (6" x 3", 1/2"W,1/2"D) Stucco Cement Kit Masonry Construction Hand Kit - MARSHALLTOWN Round End Magnesium Hand Float, 16 Inch x 3-1/8 Inch, Standard DuraSoft Handle, Eliminates Float Marks, Provides Smooth Finish, Made in the USA, Concrete Float, 143D --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/5175199-expo4050-series-4-x50-expansion-joint-no-size-no-color](https://www.desertcart.vu/products/5175199-expo4050-series-4-x50-expansion-joint-no-size-no-color) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-06-05*