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โ Seal your marine projects with confidence and style!
SIKA Sikaflex-291 LOT is a premium black, one-component polyurethane marine adhesive and sealant designed for superior bonding and sealing on wood, fiberglass, and metal. Its elastic, non-corrosive formula resists fresh and saltwater, diluted acids, and oils, curing fully in 24 hours with a paintable, sandable finish. Ideal for professional marine applications above and below the waterline, it offers easy application via various piston guns and ensures durable, vibration-resistant joints.










| ASIN | B00C50GIQI |
| Best Sellers Rank | #19,449 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #14 in Polyurethane Adhesives #49 in Urethane Adhesives |
| Brand | SIKA |
| Brand Name | SIKA |
| Color | Black |
| Compatible Material | Fiberglass, Metal, Wood |
| Container Type | Cartridge |
| Customer Reviews | 4.6 out of 5 stars 357 Reviews |
| Full Cure Time | 24 hours |
| Included Components | Sealant |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Type Name | Adhesive |
| Item Weight | 10.1 ounces |
| Manufacturer | Sika USA |
| Material | 1-C polyurethane |
| Material Type | 1-C polyurethane |
| Model | 90927 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Water Resistant |
| Part Number | 90927 |
| Special Feature | Water Resistant |
| Specific Uses For Product | Marine, Underwater |
| UPC | 033886005289 |
| Unit Count | 10.1 Fluid Ounces |
| Viscosity Level | Medium to High |
| Volume | 10.1 fluid ounces |
| Warranty Description | Warranty |
| Water Resistance Level | Water Resistant |
J**T
White Caulk for the win
Best caulk Iโve ever had the pleasure to work with. Filled the cracks like none other. You know, I was debating the Black Caulk, because I thought it might be more filling, but the white Marine Caulk, was enough to get the job done.
A**R
Good adhesive for a boating project
I used this to attach a heavy duty rub rail on my old BW Outrage (belt and suspenders approach, I didn't trust that the screws that came with the rub rail would work). It's been six months since I did the work and it seems to be holding well. Cures somewhat quickly which makes it tricky to use on a large area in summer heat. I'd use it again before the #M product.
B**D
Easy to apply, looks like a good seal
I used it to seal between the body and the bottom pan of a 1970s VW Beetle I'm rebuilding. It'll take me months to find if the seal provided by this product is durable. But for now, it looks encouraging. Also, it is rated for "below the waterline", and that should be more than sufficient overkill for a Volkswagen. As I had to apply the sealant from below the car, it dripped a little bit but not badly. The product flows into place readily and can be smoothed, like caulk, with a gloved (!!!) finger. Go without gloves and have a very messy clean-up coming. The product dries to a deep glossy black. As it is paintable, I plan to spray the bottom of the car with undercoating for protection. The seals cured overnight and look confidence-inspiring.
A**R
On time
Great for the boat seams
O**O
Excelente artรญculo, lo volverรญa a comprar
Muy bueno, aunque debe saber que demora unas 48 horas para que seque bien y mรกs si es muy grande el grosor que aplicรณ pero calidad extrema
J**B
as described
as described
A**R
๐
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R**Y
As expected
Works good.
S**V
Works well
Works well, strong adhesion & hard cured coating
S**Y
Good product
Good product.
S**.
A1 ++
Toujours le best pour les bateaux!
P**E
Automotive trim seal
Best product for my application
A**R
Used for wetsuits
Excellent product for gluing storage pockets onto wetsuits or for neoprene repair.
Trustpilot
3 days ago
1 month ago