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

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

is this product good to use between concrete pool and paver decking

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.

Could this be used for a concrete form?

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.

Is this product UV resistant?

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.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Reflectix EXPO4050 Series 4"x50' Expansion Joint

Product ID: 120283378

Details

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

💧Waterproof for lasting durability

📏4-inch width for precise gap filling

🛠️50-foot length covers extensive expansion needs

€ 132.84

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

Description

🛠️ Seal the gap, secure your space — don’t let expansion slow you down!

BUILT TO LAST - Waterproof plastic material resists wear and weather damage
TRUSTED BRAND QUALITY - Manufactured by Reflectix, a leader in weatherization
VERSATILE APPLICATION - Ideal for walls and various expansion joint needs
EFFORTLESS INSTALLATION - Easy-to-use paste form speeds up your project
PRECISION FIT MAXIMUM COVERAGE - 4" width and 50' length ensure seamless expansion joint sealing

The Reflectix EXPO4050 Series 4"x50' Expansion Joint is a durable, waterproof plastic paste designed for precise and extensive gap filling in walls. Manufactured by Reflectix in the USA, it offers a reliable, easy-to-use solution for weatherization and expansion joint sealing projects.

Specifications

ASIN	B004WAPFS6
Best Sellers Rank	984,989 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,708 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	499 g
Item form	Paste
Item weight	499 g
Manufacturer	REFLECTIX INC
Manufacturer Part Number	EXPO4050
Material	Plastic
Maximum Gap Fill	50 Inches
Maximum gap fill	50 Inches
Model Number	EXPO4050
Number of Items	1
Surface Recommendation	Walls
Surface recommendation	Walls
UPC	716511560017
Unit Count	1.0 count
Water Resistance Level	Waterproof

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.