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Sikaflex  |  SKU: SIK-291WHT-300

Sikaflex 291 Fast Cure Marine Adhesive & Sealant

$1599 CAD $1899

**Please note: on sale Sikaflex past best before date, but is still good for 3-6 months**

Colour: White
Size
Ships By Sat, June 27 Free Canada Shipping over $120

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

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

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

If something isn’t right, reach out and we’ll make it right.

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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Frequently 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.

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