Bostik Ultraseal Vapour Barrier Kit 4L is a high-performance, self-sealing bentonite sheet membrane designed for below-grade waterproofing of concrete foundations, retaining walls, and basements. Combining sodium bentonite and a polyethylene liner, it forms a durable, self-healing barrier that swells on contact with water to prevent leaks and protect structural integrity.
► Key Features
‣ Active bentonite technology – swells to seal cracks and voids automatically
‣ Provides positive waterproofing even under hydrostatic pressure
‣ Compatible with cast-in-place and precast concrete
‣ Easy to install – overlaps bond tight without heat welding or adhesives
‣ Resistant to puncture, water, and chemical attack
‣ Ideal for below-ground slabs, foundations, tunnels, and retaining walls
‣ Remains effective for the life of the structure
► Technical Specifications
‣ Type: Bentonite sheet waterproofing membrane
‣ Composition: Sodium bentonite + HDPE liner
‣ Thickness: Approx. 6mm
‣ Swell Capacity: >10x dry volume in water
‣ Coverage: 1.0m x 5.0m rolls
‣ Application: Vertical and horizontal below-grade waterproofing
‣ Standards: Meets AS 4654.1 requirements for waterproofing membranes
Built tough for civil, commercial, and infrastructure projects, Bostik Ultraseal delivers permanent, self-healing waterproof protection under extreme site conditions—trusted by builders and engineers who can’t afford failure.
► Industrial Shed’s Trade Guarantee – Shop with Confidence
‣ We Stand By Our Gear: If it’s not tough enough for the job, we’ll make it right.
‣ Loyalty Matters: Exclusive trade account perks for repeat customers.
‣ Real Support, No Runaround: Talk to real people who understand your business.
‣ Fast Delivery, Every Time: No delays, no excuses—just reliable service.
► Stock won’t last—get yours now at Industrial Shed!
At Industrial Shed, we know you need your gear fast and without the runaround. Here’s what makes our shipping better:
Local Delivery, Done In-House: If you're on the Mornington Peninsula, we handle delivery ourselves—no middlemen, no delays. Get your tools the same day or next day, straight from our team to your door.
Nationwide Reach, Reliable Partners: Need it shipped across Australia? We work with top couriers to offer standard and express options, so you get your order when you need it.
Track Every Step: You’ll get a tracking number the moment your order ships. No guessing—just a clear view of where your delivery’s at.
Service with a Real Human Touch: Got special delivery needs? Give us a shout. We’re here to make it happen, no fuss.
With Industrial Shed, you're not just another package in the mail. We get your order to you fast, safe, and with the reliability you expect.
For more information, visit Shipping Details: The Essentials.
At Industrial Shed, we keep things simple. If something’s not right or you’re not satisfied, we’ll sort it out—fast and easy.
What Sets Us Apart?
Fast Turnaround: We don’t mess around. When you need to return an item, we process it quickly so you’re not left waiting. Our goal is to get your refund or exchange sorted fast so you can get back to work.
Local Touch: For customers on the Mornington Peninsula, we offer the added benefit of in-store returns for quicker resolution. No shipping hassles—just bring it back to us, and we’ll handle the rest.
No-Nonsense Support: We make returns and refunds straightforward. If there’s a problem, you won’t be stuck in endless back-and-forths. We’re hands-on and get it sorted with minimal hassle.
Clear Policies, No Surprises: We believe in being upfront. Our return and refund policy is clear, so you know exactly what’s covered—whether it’s warranty claims, special orders, or regular returns. You’ll never be left guessing.
Built for Tradies: We understand the demands of the job, so we’re all about making returns and refunds simple, quick, and no fuss—because downtime is the last thing you need.
For more information, visit Returns & Refunds: Straight Talk.
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