---
product_id: 5175199
title: "Reflectix EXPO4050 Series 4\" x50' Expansion Joint, No Size, No Color"
brand: "reflectix"
price: "KD 24.10"
currency: KWD
in_stock: true
reviews_count: 8
category: "Reflectix"
url: https://www.desertcart.com.kw/products/5175199-reflectix-expo4050-series-4-x50-expansion-joint-no-size-no
store_origin: KW
region: Kuwait
---

# Waterproof foam material 4-inch expansion width 50-foot length for large projects Reflectix EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color

**Brand:** reflectix
**Price:** KD 24.10
**Availability:** ✅ In Stock

## Summary

> 🧱 Seal the gap, secure your space — expansion done right!

## Quick Answers

- **What is this?** Reflectix EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color by reflectix
- **How much does it cost?** KD 24.10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/5175199-reflectix-expo4050-series-4-x50-expansion-joint-no-size-no)

## 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

- • **Extended Coverage:** 50 feet of durable foam ensures you’re ready for any project size.
- • **Trusted Brand Quality:** Reflectix reliability with a 4.4-star rating from 470+ pros.
- • **Waterproof Durability:** Built to withstand moisture, protecting your walls and surfaces.
- • **Effortless Installation:** Lightweight 1.1 lb foam that’s easy to handle and apply.
- • **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

## 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 | #29,391 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #129 in Wall Surface Repair Products |
| Brand | Reflectix |
| Brand Name | Reflectix |
| Color | Black |
| Customer Reviews | 4.3 out of 5 stars 483 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

![Reflectix 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

### ⭐⭐⭐⭐⭐ Review
*by D***E on March 2, 2025*



### ⭐⭐⭐⭐⭐ Review
*by W***S on August 23, 2025*



### ⭐⭐⭐⭐ Review
*by V***U on November 20, 2013*



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**Shop now:** [https://www.desertcart.com.kw/products/5175199-reflectix-expo4050-series-4-x50-expansion-joint-no-size-no](https://www.desertcart.com.kw/products/5175199-reflectix-expo4050-series-4-x50-expansion-joint-no-size-no)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-05-13*