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Bostik OB1 Sealant & Adhesive Grey 290ml
SKU:
BOS30617357
Availability:
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Bostik OB1 Sealant & Adhesive Grey 290ml
Need a sealant that actually sticks, seals, and lasts—no matter the conditions? The Bostik OB1 Sealant & Adhesive Grey 290ml is a next-generation hybrid polymer adhesive built for professionals who demand maximum strength, flexibility, and reliability on every job.
Unlike standard silicones or mastics, OB1 delivers extreme bonding power across almost any material, including concrete, metal, wood, glass, PVC, GRP and more—making it one of the most versatile sealant adhesives on the market. Whether you're working on roofing, construction, bathrooms or general repairs, this is your go-to all-in-one solution.
What sets OB1 apart is its ability to bond even on wet surfaces or underwater, saving time on site and eliminating delays caused by weather. Its solvent-free, odourless formula ensures a clean application while preventing shrinkage, cracking or failure over time.
Designed for durability, OB1 forms a permanently flexible, waterproof seal that resists weathering, UV exposure, and temperature extremes from -40°C to +120°C—ideal for demanding UK conditions.
Why OB1 Outperforms Standard Sealants
- Bonds virtually any material – no primer required
- Works in wet or dry conditions (even underwater)
- Will not shrink, crack or become brittle over time
- Flexible & high-strength bond for movement joints
- Waterproof, weatherproof & UV resistant
- Mould & bacteria resistant – ideal for kitchens & bathrooms
- Paintable for a clean, professional finish
Perfect For
- Roofing repairs, flashing & gutter sealing
- Bathrooms, kitchens & sanitary sealing
- Bonding panels, trims, mirrors & fixtures
- Construction joints & expansion areas
- Automotive, marine & industrial applications
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Specification
Brand
Bostik
Colour
Grey
Size
290ml
Type
Adhesive/Sealant
Usage
For Interior & Exterior Use
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