Sikaflex-291 LOT Marine Sealant – White, 300mL Cartridge | SIK-291LOTWHT-300
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You have 30 days to request a return. All sale items are final sale.
Sikaflex-291 LOT Marine Sealant – White, 300mL Cartridge
A trusted one-component polyurethane sealant built for the demands of the marine environment. Sikaflex-291 LOT bonds and seals in a single application — curing to a tough, permanently flexible seal that moves with the boat without cracking or losing adhesion. The white colour blends cleanly with white gelcoat, deck hardware, and trim for a professional finish.
Key Features
- One-component polyurethane — no mixing required, ready to apply from the cartridge
- Permanently flexible cure — accommodates hull and deck movement without cracking
- Excellent adhesion to fibreglass, GRP, wood, aluminium, and most plastics
- Waterproof and UV-resistant once cured
- White colour — ideal for white gelcoat decks and hardware
- 300mL cartridge — fits standard caulking guns
- Paintable after full cure
Parts Desk Insights
Best use case: Sikaflex-291 LOT is the go-to sealant for above-waterline deck fitting installations — cleats, stanchion bases, hatches, port lights, and through-deck fittings where a flexible, watertight seal is needed. The LOT (Low Odour Technology) formulation makes it more comfortable to work with in enclosed spaces like cabins and lockers. It bonds well to fibreglass and aluminium, making it suitable for most production boat hardware installs. For black hardware or a less visible bead, see the Sikaflex-291 Black 300mL Cartridge. For UV-critical above-deck applications, consider the Sikaflex UV Resistant Sealant.
Specifications
- SKU: SIK-291LOTWHT-300
- Chemistry: One-component polyurethane
- Colour: White
- Volume: 300mL
- Format: Cartridge (fits standard caulking gun)
- Cure type: Moisture-curing, permanently flexible
- Application: Above-waterline deck fittings, hatches, port lights, stanchion bases, trim
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.