Sikaflex 291GR Marine Polyurethane Adhesive / Sealant – Grey, 11 oz. Cartridge
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You have 30 days to request a return. All sale items are final sale.
Sikaflex 291GR – Marine Polyurethane Adhesive & Sealant, Grey
Sikaflex 291GR is a one-component, moisture-curing polyurethane adhesive and sealant built for the demands of the marine environment. Its low-viscosity formula flows readily into joints and irregular surfaces, curing to a durable, flexible, waterproof seal that holds up against UV exposure, saltwater, and constant vibration. The grey colour integrates cleanly with aluminum, stainless steel, and painted deck surfaces where white or black would stand out.
Key Features
- One-component — no mixing, ready to apply
- Fast cure, medium modulus — flexible bond that moves with the boat
- Low viscosity — penetrates tight joints and uneven surfaces
- Excellent adhesion to fibreglass, wood, metals, and most plastics
- Resistant to UV, saltwater, fuel splash, and weathering
- Paintable after full cure
- Grey colour — blends with aluminum fittings and grey deck surfaces
Compatible Applications
- Deck hardware bedding (cleats, fairleads, stanchion bases, pad eyes)
- Through-hull fittings and port lights
- Hatches, portlights, and windshield frames
- General above-waterline sealing and bonding
- Aluminum and stainless steel fittings on fibreglass hulls
Parts Desk Insights
The grey variant is the right call when colour match matters — particularly for installations on grey or silver-toned decks, aluminum toe rails, and stainless hardware. Boaters bedding stanchion bases, cleats, or windshield frames on fibreglass consistently choose grey to avoid the visual contrast of white or black sealant against bare metal. For UV-critical glazing or window bonding, step up to Sikaflex 295UV. Need the same formula in a different colour? See Sikaflex 291BK (Black) or Sikaflex 291WH (White).
Related Products
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.