Can this be used in concrete driveway expansion joints?

Not tough enough, indoors only.

is this closed cell? suitable for a bath which will have silicone put over it?

I'm no expert, but I would say no, as I've put the tubing into gap between the roof and the wall of a conservatory and it has contracted/shrunk quite considerably, resulting in a draught around the ends of the sealant tubing. Whether covering it with silicone would make any difference, I don't know.

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Foam Sealant Joint Backer Rod 25mm x 10 Metre

Product ID: 51559528

Details

Brand
Everbuild
Item form
Foam
Material
Polyurethane
Style
Compact
Water resistance level
Waterproof

💧Closed-cell waterproof foam

📏25mm perfect joint size

🛠️10m easy application length

¥19486

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Seal smarter, save bigger — the pro’s choice for flawless joints!

SEALANT SAVER - Reduces sealant usage, saving costs and materials
PRECISION JOINT FIT - Ensures optimal sealant thickness for maximum durability
WATERPROOF SOUNDPROOF - Superior closed-cell foam blocks moisture and noise effectively
THERMAL INSULATION BOOST - Enhances heat retention for energy-efficient spaces
QUICK FLEXIBLE APPLICATION - Easy to cut and install, speeding up your project timeline

Everbuild Foam Sealant Joint Backer Rod is a 25mm thick, 10-meter long closed-cell polyurethane foam designed to optimize expansion joint sealing. It prevents three-sided adhesion, reduces sealant consumption, and enhances waterproofing, soundproofing, and thermal insulation. Ideal for concrete, metal, and rigid materials, it’s a must-have for professional-grade, efficient sealing projects.

Specifications

ASIN	B006PFZS5Q
Best Sellers Rank	21,446 in DIY & Tools ( See Top 100 in DIY & Tools ) 402 in Sealers
Brand	Everbuild
Colour	Red
Compatible Material	Concrete, Metal, Rigid Materials
Country Of Origin	United Kingdom
Customer Reviews	4.5 4.5 out of 5 stars (148)
Item Form	Foam
Manufacturer	Everbuild
Manufacturer Part Number	EVBBACK2510M
Material	Polyurethane
Model Number	EVBBACK2510M
Number of Items	1
Number of Packs	1
Style Name	Compact
UPC	610708898436
Unit Count	10 meter
Water Resistance Level	Waterproof

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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.

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TrustScore 4.5 | 7,300+ reviews

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Great experience from order to delivery. Highly recommended!

1 week ago

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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¥19486

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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