Sikaflex 291 LOT Marine Adhesive / Sealant – Black, 11 oz. Cartridge (884-291LOTBK)
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Sikaflex 291 LOT Marine Adhesive / Sealant – Black, 11 oz. Cartridge
Sikaflex 291 LOT Black is a one-component, moisture-curing polyurethane adhesive and sealant with an extended open time and reduced surface tack compared to standard Sikaflex 291. The longer working window makes it easier to tool joints, position hardware, and clean up squeeze-out before the material skins — a real advantage on larger sealing runs or in warm conditions where standard 291 cures quickly.
The black colour makes it the natural choice wherever a dark or invisible sealant line is preferred: black hull seams, dark rub rails, teak deck seams, and black-trimmed hardware. Slightly more flexible than standard 291, it cures to a durable, paintable, watertight seal resistant to UV, saltwater, and fuel splash.
Compatible Applications
- Black hull seams and below-waterline sealing
- Through-hull fittings on dark or black hulls
- Teak deck seams
- Black rub rail bedding and installation
- Deck hardware bedding where a dark sealant line is preferred
- Portlights and cabin windows with black frames
- General above- and below-waterline sealing on fiberglass, wood, and metal
Key Features
- One-component — no mixing required
- LOT formula — longer open/working time than standard Sikaflex 291
- Slightly more flexible than standard 291 — ideal for moving joints
- Moisture-activated cure
- Paintable after cure
- Resistant to UV, saltwater, and fuel splash
- 11 oz. (310 ml) standard cartridge — fits standard caulking guns
- SKU: 884-291LOTBK
Related Products
- Sikaflex 291 LOT White – 11 oz. Cartridge
- Sikaflex 291 Black – 11 oz. Cartridge (standard formula)
- Sikaflex 291 White – 11 oz. Cartridge (standard formula)
- Sikaflex 292 Polyurethane – White, 10.3 oz. Cartridge (structural grade)
- Sikaflex 205 Primer – 250 ml
Parts Desk Insights
Choose the 291 LOT Black when colour match matters and you need extra working time — teak deck seams, black rub rails, and dark hull seams are the primary use cases. The extended open time is especially useful in warm weather when standard Sikaflex 291 Black can skin before you’ve finished tooling a long seam. If working time isn’t a concern and you just need a black sealant, standard 291 Black cures faster. For structural bonding in black, check whether Sikaflex 292 (available in white) meets your strength requirements. Pair with Sikaflex 205 Primer on porous or difficult substrates.
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.