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โ Seal the deal with Sikaflex-291 โ where marine strength meets speedy precision!
Sika Sikaflex-291 is a black, one-component polyurethane marine adhesive and sealant designed for robust, waterproof bonding in marine construction. It cures rapidly upon exposure to moisture, forming durable, vibration-resistant seals that resist freshwater, saltwater, fuels, and oils. Packaged in a convenient 10.1 fl oz cartridge, it bonds to a wide range of materials including aluminum, wood, ceramics, and plastics, and can be sanded and painted for a professional finish. Certified to international maritime and ISO standards, itโs the trusted choice for millennial professionals demanding reliability and efficiency in marine repairs and builds.










| Asin | B00C501KD4 |
| Brand Name | SIKA |
| Color | Black |
| Compatible Material | Aluminum |
| Container Type | Cartridge |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,184) 4.5 out of 5 stars |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00033886005272 |
| Included Components | sealant |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Type Name | Adhesive |
| Item Weight | 10.1 Ounces |
| Manufacturer | Sika USA |
| Material Type | 1-C Polyurethane |
| Model | 90923 |
| Number Of Pieces | 1 |
| Other Special Features Of The Product | Water Resistant |
| Part Number | 017-90923 |
| Specific Uses For Product | Marine |
| Unit Count | 10.1 Count |
| Upc | 033886005272 |
| Viscosity Level | High |
| Volume | 10.1 Fluid Ounces |
| Water Resistance Level | Waterproof |
User
bon produit ,la personne est satisfaite
article conforme
User
Holds well, good gap filler.
Used this to fill the seam between the hull and deck. Used an electric calking gun allowing for controlled flow into the seams which were 22ft runs from stern to bow. took two tubes of Silkaflex. While fresh it was easy to use a scraper to push this material deeper into the seam and simple to remove excess leaving a smooth seam level with the deck. It took several days to harden to my satisfaction and in the meantime collected a layer of dust onto its surface. Once painted there is a subtle but clear discoloration showing through the paint. It's a good product but as this was a restoration job on a classic wooden boat I think epoxy would have been a better choice. But, no complaints with how this material works and I'm sure it will hold up for some time as the hull and deck flex a bit with movement and with the natural swelling and shrinking inherent in wood.
User
Very good
This is a very good product. It would probably stick to water. D
User
Perfect for SportsPal aluminum canoe repair
I bought this Sika 291 to repair an aluminum canoe. This marine urethane is basically the same thing that SportsPal sells in their repair kit. I haven't used it yet but based on other reviews it will be fine for the repair I set out to accomplishRegarding other reviewers stating they received out of date or wrong colour product, I ordered black and got black and the use by date was 9 months into the future (July 2025) beyond my purchase date Nov/2024.
User
Works great for a fishing kayak sonar tranducer
I used this adhesive to bond a sonar transducer to the bottom of a fishing kayak after watching some helpful videos on You Tube, it does as advertised and created a strong bond and there is no signal interference whatsoever.I would suggest bonding and orienting the transducer while the kayak is in the water so you can match the actual depth and the reading on the sonar as it needs to be oriented perfectly.
Trustpilot
2 months ago
1 week ago