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Sikaflex  |  SKU: SIK-291LOTWH

Sikaflex 291 LOT Slow Cure Marine Adhesive & Sealant – 300ml

$15.99 CAD $18.99

Sikaflex291 LOT is a 1-component, all purpose marine gradepolyurethane elastomeric adhesive, sealant and bedding compound.

Colour: White
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✔ Locally owned in Nanaimo, BC
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Sikaflex® 291 LOT is a premium one-component polyurethane marine adhesive and sealant designed for applications that require a longer working time before curing. Available in Black and White, its slow cure formula makes it ideal for larger installations, complex assemblies, and projects where extra positioning time is needed.

Moisture cured and permanently flexible, Sikaflex 291 LOT creates a durable waterproof seal that resists vibration, saltwater, weather, and UV exposure. It bonds exceptionally well to fiberglass, wood, aluminum, stainless steel, and many plastics commonly used in marine environments.

Perfect for bedding deck hardware, sealing hatches, installing windows, or general boat maintenance, Sikaflex 291 LOT provides professional-grade performance both above and below the waterline.

Features

  • Available in Black and White
  • Long open time for easier installation
  • Marine-grade polyurethane adhesive and sealant
  • Waterproof and weather resistant
  • Suitable for above and below the waterline
  • Permanently flexible after curing
  • Excellent adhesion to fiberglass, wood, aluminum, stainless steel, and many plastics
  • Paintable and sandable after curing
  • Resists vibration, saltwater, and harsh marine environments
  • NSF approved for potable water contact

Ideal Applications

  • Deck hardware installation
  • Bedding cleats and rails
  • Hatches and portlights
  • Rub rails
  • Hull fittings
  • Marine windows
  • Cockpit accessories
  • RV and camper sealing
  • General waterproof sealing

Specifications

Feature Details
Brand Sika
Product Sikaflex 291 LOT
Colours Available Black, White
Size 300 ml (10.3 oz) Cartridge
Cure Type Moisture Cure Polyurethane
Working Time Extended (Long Open Time)
Paintable Yes
Sandable Yes
Above Waterline Yes
Below Waterline Yes

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Frequently Asked Questions

Q. What is Sikaflex 291 LOT used for?

Sikaflex 291 LOT is a marine-grade polyurethane adhesive and sealant designed for bedding deck hardware, sealing hatches, portlights, windows, hull fittings, and general waterproof sealing on boats, RVs, and trailers.

Q. What does LOT stand for?

LOT stands for Long Open Time. It provides a longer working time before the sealant skins over, making it ideal for larger installations and projects that require extra positioning time.

Q. Can Sikaflex 291 LOT be used below the waterline?

Yes. Sikaflex 291 LOT is suitable for sealing applications both above and below the waterline, making it a versatile choice for many marine projects.

Q. What colours are available?

This product is available in Black and White. Choose the colour that best matches your boat, RV, or application.

Q. Can Sikaflex 291 LOT be painted?

Yes. Once fully cured, Sikaflex 291 LOT can be sanded and painted if desired.

Q. What materials does Sikaflex 291 LOT bond to?

It bonds well to fiberglass, gelcoat, wood, aluminum, stainless steel, painted metals, and many plastics commonly found in marine applications.

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