Sikaflex 291 vs 291 LOT: Which Marine Sealant Is Best?
Not sure whether to choose Sikaflex 291 Fast Cure or 291 LOT? Learn the key differences, best applications, and which marine sealant is right for your next boat repair or...
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Sikaflex | SKU:
SIK-291WHT-300
Sikaflex 291 Fast Cure Marine Adhesive & Sealant
Sale price
$15.99 CAD
Regular price
$18.99
Unit price
/
Unavailable
Sikaflex 291 Fast Cure Marine Adhesive & Sealant - White / 300ml Cartridge is in stock and available for pickup within 24hrs.
Ships By Sat, November 14
Special order — shipping time varies
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Why Shop With Us
Why Shop With Us
✔ Locally owned in Nanaimo, BC
✔ Trusted by boaters and anglers since 1986
✔ Knowledgeable staff with real on-the-water experience
✔ Large in-stock selection of marine & fishing gear
We’re here to help you get the right gear the first time.
Shipping & Pickup
Shipping & Pickup
We ship across Canada with fast, reliable delivery from our Nanaimo location.
✔ Trusted since 1986
✔ Fast Canada-wide shipping
✔ Expert support available
Need it sooner or have questions? Our team is here to help.
Returns & Warranty
Returns & Warranty
We stand behind the products we sell and want you to shop with confidence.
✔ Easy returns on eligible items
✔ Manufacturer warranties supported
✔ In-store support available if you need help
Some items are non-returnable. Please review our full Return & Refund Policy before completing your purchase.
Sikaflex 291 is a premium one-component polyurethane marine adhesive and sealant designed for permanent sealing and light-duty bonding applications where a fast cure time is important. Available in White, Black, and Aluminum Gray it provides a durable, waterproof, and flexible seal that withstands harsh marine environments.
Trusted by boat builders and marine professionals worldwide, Sikaflex 291 bonds to a wide variety of materials including fiberglass, wood, aluminum, stainless steel, painted surfaces, and many plastics. Its fast curing formula makes it an excellent choice for repairs, maintenance, and new installations where reduced downtime is desired.
Ideal for bedding deck hardware, sealing hatches, installing windows, and general marine maintenance, Sikaflex 291 delivers long-lasting performance both above and below the waterline.
Features
- Fast curing polyurethane adhesive and sealant
- Available in Black and White
- Marine-grade waterproof performance
- Suitable for above and below waterline applications
- Permanently flexible after curing
- Excellent adhesion to fiberglass, wood, aluminum, stainless steel, and many plastics
- Paintable and sandable after curing
- Resistant to vibration, saltwater, weather, and aging
- Easy cartridge application
- Ideal for marine, RV, trailer, and industrial projects
Ideal Applications
- Bedding deck hardware
- Cleats and rails
- Hatches and portlights
- Marine windows
- Rub rails
- Hull fittings
- Cockpit accessories
- RV and camper sealing
- General waterproof sealing and repairs
Compatible Materials
- Fiberglass
- Gelcoat
- Wood
- Aluminum
- Stainless Steel
- Painted metals
- Marine composites
- Many plastics (excluding stress-cracking plastics such as acrylic and polycarbonate)
Specifications
| Feature | Details |
|---|---|
| Brand | Sika |
| Product | Sikaflex 291 |
| Colours | White, Black |
| Size | 300 ml (10.3 oz) |
| Cure Type | Moisture Cure Polyurethane |
| Cure Speed | Fast Cure |
| Paintable | Yes |
| Sandable | Yes |
| Above Waterline | Yes |
| Below Waterline | Yes |
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BrandSikaflex
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SKUSIK-291WHT-300
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TypeCompounds - Sealants
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Coating sealant applicationLeak proofing, Weatherproofing
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Color patternWhite, Black, Aluminum Gray
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Durability featuresWaterproof, Weather resistant, UV resistant
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Package typeTube
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Suitable for material typeFiberglass, Metal, Wood, Aluminum, Plastic
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Suitable spaceIndoors, Outdoors
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Vehicle application areaExterior, Interior
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Vehicle cleaning item featuresDurable
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Vehicle typeWatercraft
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Barcode033886005258
Want to learn more?
View allFrequently Asked Questions
Q. What is Sikaflex 291 used for?
Sikaflex 291 is a marine-grade polyurethane adhesive and sealant used for bedding deck hardware, sealing hatches, windows, portlights, hull fittings, and general waterproof sealing on boats, RVs, and trailers.
Q. What is the difference between Sikaflex 291 and 291 LOT?
Sikaflex 291 is a fast cure formula that reaches handling strength more quickly, while Sikaflex 291 LOT has a longer open time, making it better suited for larger installations or projects that require additional working time.
Q. Can Sikaflex 291 be used below the waterline?
Yes. Sikaflex 291 is suitable for sealing applications both above and below the waterline.
Q. What colours are available?
This product is available in White and Black to suit a variety of marine and RV applications.
Q. Can Sikaflex 291 be painted?
Yes. Once fully cured, Sikaflex 291 can be sanded and painted if required.
Q. What materials does Sikaflex 291 bond to?
It bonds well to fiberglass, gelcoat, wood, aluminum, stainless steel, painted metals, and many plastics commonly found in marine construction.
L
White / 300ml Cartridge
48 tubes went into paying the joints of my old 50' boat, this stuff is awesome. Maybe 4 bubbles in all those tubes. Great QC.
A
Aluminum Gray / 300ml Cartridge
Good stuff
A
White / 300ml Cartridge
Great price when on sale
A
White / 300ml Cartridge
Great service
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