---
product_id: 5175199
title: "Reflectix EXPO4050 Series 4\" x50' Expansion Joint, No Size, No Color"
brand: "reflectix"
price: "R2429"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Reflectix"
url: https://www.desertcart.co.za/products/5175199-reflectix-expo4050-series-4-x50-expansion-joint-no-size-no
store_origin: ZA
region: South Africa
---

# Waterproof design for durability 4-inch width for precise gap filling 50-foot length for versatile applications Reflectix EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color

**Brand:** reflectix
**Price:** R2429
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal the deal with Reflectix – where durability meets precision!

## Quick Answers

- **What is this?** Reflectix EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color by reflectix
- **How much does it cost?** R2429 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/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

- • **Built to Last:** Waterproof plastic material withstands moisture, ensuring long-term performance.
- • **Effortless Installation:** Easy to cut and configure, saving you time and hassle on site.
- • **Precision Fit, Every Time:** 4" width ensures seamless expansion joint coverage for professional-grade results.
- • **Durability Meets Adaptability:** Rigid yet flexible foam adapts perfectly to concrete and asphalt surfaces.
- • **Extended Reach, Maximum Flexibility:** 50' length lets you tackle large projects without interruption or multiple joins.

## Overview

The Reflectix EXPO4050 Series Expansion Joint is a 4" wide by 50' long waterproof foam strip designed for professional wall surface repairs. Combining rigidity and flexibility, it fits perfectly in concrete and asphalt gaps, is easy to cut and install, and offers reliable durability for lasting performance.

## Description

Reflectix EXPO4050 Series 4" x50' Expansion Joint, No Size, No Color

Review: Works as should. - Good stuff.
Review: Rigid but Flexible - This expansion material is absolutely the best on the market. Rigid enough to put in place with pins but flexible enough to be used with concrete and asphalt. Easy to cut and configure to desired height and length.

## 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 | #27,643 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #121 in Wall Surface Repair Products |
| Brand | Reflectix |
| Brand Name | Reflectix |
| Color | Brown |
| Customer Reviews | 4.3 out of 5 stars 497 Reviews |
| 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 |
| Number of Packs | 10 |
| Part Number | EXPO4050 |
| Surface Recommendation | Walls |
| UPC | 716511560017 |
| Unit Count | 1 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

### ⭐⭐⭐⭐⭐ Works as should.
*by M***D on August 10, 2026*

Good stuff.

### ⭐⭐⭐⭐⭐ Rigid but Flexible
*by T***I on June 18, 2026*

This expansion material is absolutely the best on the market. Rigid enough to put in place with pins but flexible enough to be used with concrete and asphalt. Easy to cut and configure to desired height and length.

### ⭐⭐⭐⭐ 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
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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-08-18*