---
product_id: 120283378
title: "Reflectix EXPO4050 Series 4\"x50' Expansion Joint"
brand: "reflectix"
price: "194469CFA"
currency: XOF
in_stock: true
category: "Reflectix"
url: https://www.desertcart.sn/products/120283378-reflectix-expo4050-series-4x50-expansion-joint
store_origin: SN
region: Senegal
---

# Waterproof design for lasting durability 4-inch width for precise gap filling 50-foot length covers extensive expansion needs Reflectix EXPO4050 Series 4"x50' Expansion Joint

**Brand:** reflectix
**Price:** 194469CFA
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal the gap, secure your space — expansion perfected!

## Quick Answers

- **What is this?** Reflectix EXPO4050 Series 4"x50' Expansion Joint by reflectix
- **How much does it cost?** 194469CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/120283378-reflectix-expo4050-series-4x50-expansion-joint)

## 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

- • **Built to Last:** Waterproof plastic material resists wear and weather damage
- • **Trusted Brand Quality:** Manufactured by Reflectix, a leader in weatherization solutions
- • **Effortless Installation:** Lightweight 1.1 lb design makes application quick and easy
- • **Versatile Wall Compatibility:** Optimized for wall surfaces to prevent drafts and moisture intrusion
- • **Precision Fit, Maximum Coverage:** 4" width and 50' length ensure seamless expansion joint sealing

## Overview

The Reflectix EXPO4050 Series 4"x50' Expansion Joint is a durable, waterproof plastic weatherization solution designed for walls. Lightweight and easy to install, it offers precise 4-inch width coverage over a 50-foot length, making it ideal for sealing expansion gaps and preventing moisture intrusion. Manufactured by Reflectix, this product combines trusted brand quality with practical performance for professional-grade weather stripping.

## Description

REFLECTIX EXPO4050 Series 4"x50' Expansion Joint

## 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 | 970,098 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,676 in Weather Stripping |
| Brand | Reflectix |
| Colour | Black |
| Country Of Origin | USA |
| Global Trade Identification Number | 00716511560017 |
| Included Components | Appliance Parts & Accessories, Appliance Replacement Parts, appliance-replacement-parts |
| Item Form | Paste |
| Item Type Name | 4"x50' Expansion Joint |
| Item Weight | 1.1 Pounds |
| Manufacturer | REFLECTIX INC |
| Manufacturer Part Number | EXPO4050 |
| Material | Plastic |
| Maximum Gap Fill | 50 Inches |
| Model Number | EXPO4050 |
| Number of Items | 1 |
| Surface Recommendation | Walls |
| UPC | 716511560017 |
| Unit Count | 1.0 count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Reflectix
- **Colour:** Black
- **Item form:** Paste
- **Item weight:** 1.1 Pounds
- **Maximum gap fill:** 50 Inches

## Images

![Reflectix EXPO4050 Series 4"x50' Expansion Joint - 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.

## Frequently Bought Together

- Reflectix EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color
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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-06-02*