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🔧 Seal it. Bond it. Own it. The pro’s choice for flawless fixes.
OB1 Anthracite Multi-Surface Sealant & Adhesive is a 290ml hybrid polymer formula trusted for over 20 years. It delivers exceptional bonding strength and flexibility across a wide range of materials, from metal to glass, even underwater. Engineered to withstand extreme temperatures (-40°C to +120°C) and harsh weather, it’s odourless, eco-friendly, and perfect for professional and DIY use alike.




| Asin | B08K24NG7Z |
| Best Sellers Rank | 524 in DIY & Tools (See Top 100 in DIY & Tools) 16 in Sealers |
| Brand | OB1 |
| Colour | Anthracite |
| Compatible Material | Aluminium, Fibreglass, Glass, Plastic |
| Container Type | Tube |
| Country Of Origin | Netherlands |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,287) 4.6 out of 5 stars |
| Global Trade Identification Number | 05032822004473 |
| Included Components | 290ml Cartridge with Nozzle |
| Item Form | Paste |
| Item Highlight | Hybrid Technology, Excellent Chemical Resistance, Water & Weather Resistant |
| Item Package Quantity | 1 |
| Item Type Name | Adhesive and sealant |
| Item Volume | 290 Millilitres |
| Manufacturer | Siroflex Lte |
| Manufacturer Part Number | B1SCS290A |
| Material | Hybrid Polymer |
| Model Number | B1SCS290A |
| Number Of Packs | 1 |
| Number Of Pieces | 1 |
| Other Special Features Of The Product | Hybrid Polymer Technology |
| Specific Uses For Product | Construction, Repair |
| Tensile Strength | 265 Newtons Per Square Millimeter (N/mm2) |
| Unit Count | 515.0 gram |
| Viscosity Level | Low |
| Water Resistance Level | Waterproof |
User
⭐⭐⭐⭐⭐ Professional-Grade Sealant and Adhesive That Never Lets Me Down
⭐⭐⭐⭐⭐ Outstanding Sealant and Adhesive – My Go-To for Professional UseThe OB1 Seal & Adhesive Black 290ml is one of the best all-round sealants and adhesives I’ve used. As a professional tradesperson, I need products that are reliable, easy to apply and built to last, and OB1 consistently delivers.It has excellent initial grab and bonds extremely well to a wide range of materials, even in situations where other products can struggle. The finish is neat, it tools nicely, and it cures to a strong yet flexible seal that stands up well to movement, moisture and changing weather conditions.One of the biggest advantages is its versatility. Whether I’m sealing, bonding or carrying out repairs, it’s often the first product I reach for. It also adheres well to slightly damp surfaces, making it particularly useful for emergency repairs.Pros:* Excellent bonding strength* Strong initial grab* Flexible, durable finish* Suitable for a wide range of materials* Performs well indoors and outdoors* Easy to apply and tool* Trusted for professional useThe only minor downside is that, like most high-performance adhesives, it can be a little messy if you don’t apply it carefully. Taking your time gives a very clean, professional finish.Overall, this is an exceptional sealant and adhesive that has earned a permanent place in my van. Reliable, versatile and built to last—I’d highly recommend it to both professionals and DIY users.
User
good colour match for my windows trims
The anthracite colour is a spot-on match for modern grey trim, and it doesn't shrink or crack like some cheaper sealants do over time. It gives a really neat, professional finish and holds tight straight away, even if the surface is a bit damp when you apply it. It’s easily the most reliable thing I’ve used for sealing up gaps.
User
My go to sealant 100%
Absolutely 100% amazing stuff. Did not let me down and know a shed staple, I always have some in stock. So versatile and in different colours.
User
Better than silicone.
I used this to re-seal my shower which was sealed from new less than a year ago. The silicone used was an expensive brand and colour matched to the grout, but this had started to show signs of deteriorating, and pealing at some of the corners and at random points. Rather than neglect the issues and to have problems with potential leaks, I stripped the entire seal off using multi solve and a scalpol knifeset and a silicone remover set. Once the surface was clean and degreased I applied the OB1. It is more difficult to apply than standard silicone as it's a thicker formula and does not spread well as silicone. But once smoothed through using a silicone smoothing tool it looked very nice. The finish is not smooth as you'd get from silicone but you don't get pinholes and the finished product is alot more durable. It feels like hard rubber as unlike silicone which feels spongy and soft.I've even went over the ob1 seal again once the first cost had dried out by an extra 2mm 8mm in total.I left the OB1 to dry out for 4 days before using the shower to ensure 100% curing of the seal. With OB1 I'm really confident that there won't ever be a situation of it pealing shrinking cracking or even letter water through
User
Obi 1
Good adhesive and wellnpiced
User
AMAZING STUFF!
This stuff is amazing, I've used it a number of times, used to stick brick slips ( tiles that look like bricks) along a patio edge to conceal the mortar from the lower level ~ been there for 9 years. This tube was to fix wood in the garden.
User
Buy it 10/10
Buy it.....
User
Decent adhesive but poor colour match
It’s a decent sealant and adhesive but the oak colour is a million miles from the nozzle indicator. Even the promotional picture above highlights the difference! Really don’t understand how the manufacturers think sometimes? Surely it can’t be that difficult to match the colour.
User
Ok
Excelente producto, totalmente recomendado.Cumple perfectamente con lo que promete. La calidad es muy buena, llegó rápido y en excelente estado. Estoy muy satisfecho(a) con la compra y sin duda lo volvería a comprar. ¡Vale la pena!
User
Best on the market
The best sealant / adhesive on the market, love it. It will seal of fix most things
User
NO FUNCIONA
ES UNA VERGÜENZA EL VENDEDOR, NO ME FUNCIONO BIEN EL PRODUCTO Y NO QUISO HABERSE CARGO DE LA DEVOLUCIÓNNADA RECOMENDABLE Y LE TENÍAN QUE ECHAR DE AMAZON
User
Very strong but stays just slightly pliable where a little flexibility is appreciated.
High quality product. Professional grade. Strong adhesion properties but can be removed if needed. I used it in the automotive area to bond a metal bracket to glass.
Trustpilot
4 days ago
1 month ago