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⚓ Seal it like a pro — no leaks, no limits!
Sikaflex 291i is a premium marine-grade silicone adhesive sealant available in 300ml cartridges, designed for durable, waterproof sealing on fibreglass and plastic surfaces. Trusted for its strong bonding and resistance to full immersion, it comes in black or white and is highly rated by professionals worldwide.
| ASIN | B004X7PEL6 |
| Best Sellers Rank | 55,911 in DIY & Tools ( See Top 100 in DIY & Tools ) 8 in Adhesive Caulk |
| Brand | Sika |
| Colour | White |
| Compatible Material | Fibreglass |
| Country Of Origin | Switzerland |
| Customer Reviews | 4.6 out of 5 stars 3,420 Reviews |
| Global Trade Identification Number | 07612894815009 |
| Included Components | 1 cartridge |
| Item Dimensions | 48 x 48 x 230 millimetres |
| Item Form | Paste |
| Item Type Name | Sikaflex 291i Multifunctional adhesive sealant for marine applications |
| Item Weight | 0.41 Kilograms |
| Item dimensions L x W x H | 48 x 48 x 230 millimetres |
| Item weight | 0.41 Kilograms |
| Manufacturer | Sikaflex |
| Manufacturer Part Number | 291i White |
| Material | Silicone |
| Model Number | 291i White |
| Number of Items | 1 |
| Style | Cartridge |
| Style Name | Cartridge |
| Surface Recommendation | Plastic, doors |
| Unit Count | 300.0 millilitre |
| Water Resistance Level | Waterproof |
| Water resistance level | Waterproof |
S**T
Blimey, this is proper sticky!
Problem. Modern close couple WC, syphon is glued in place, within cistern, but starts leaking, adhesive has broken down prematurely. Most silicone sealants are not suitable for full immersion, fish tank sealant not readily available locally. Solution. Marine sealant. Sikaflex products are very good, as I have used automotive sealants before. Its not expensive, by comparison to high performance silicone. It is hard to squeeze out with a gun, next time I'd probably warm it up a little. Once cured, job seems to be done. I have used it for a number of other of little leaky bits, here and there. Would imagine it would be put to a whole range of waterproofing and sealing tasks. so yes, a recommendation.
D**D
A marine quality sealant
Ideal marine quality sealant that will stop those annoying leaks. Easy to apply. Reasonable price. Waterproof.
A**R
Ok
This stuff is great for so many boat related jobs! but the biggest issue is it sets solid in the tube!!!! and if you don't use it all at once, it very quickly becomes useless and it's too expensive for that!!!! Perhaps a something to stop this would really help 🤷
S**G
Works perfectly
The ONLY sealant that works perfectly on a boat.
P**N
Good product and fast delivery
Fast delivery and packed well.
K**Y
Great product
This is a great product. Ultra sticky do you have to be careful when applying it, but it does a great job filling, sealing and sticking.
R**E
No nossels
Sikaflex is brilliant, but photo shows nossels yet none supplied adding more expense and hassle to go and buy.
D**L
Great for waterproofing cars and even boats!
This is the best waterproof sealant around, I did a lot of research as my partners car was letting in a small amount of water around one of the seals which had come off, and this was universally recommended for repairs and sealing, used heavily by the boating community who know what they are talking about. It's not cheap, but worked perfectly, a single application and the issue was fixed, great adhesion and completely waterproof once cured. Recommended!
B**2
Perfekt
Täta en pool
C**.
Ottimo
Mastice conosciuto per l'uso nautico, lo consiglio.
E**Z
güzel ve kaliteli ürün
çok teşekkür. Bu ürün hem kaliteli hem hesaplı
A**H
ottimo prodotto
Sikaflex non ha bisogno di recensioni, ottimo sigillante per uso nautico
S**D
Efficace
Très très efficace
Trustpilot
1 month ago
3 weeks ago