Sika Sikaflex® 291 LOT - Black - 3oz Tube w/Nozzle

The Sika Sikaflex® 291 LOT in black is a professional-grade marine adhesive and sealant designed for anglers, boaters, and watercraft builders who demand reliability in harsh saltwater and freshwater environments. This 3oz tube with nozzle delivers a one-component polyurethane elastomeric formula that cures through moisture exposure—ideal for hull repairs, deck sealing, transom reinforcement, and structural bonding on fiberglass, aluminum, and wood vessels. Whether you're fixing a stress crack in your fishing boat's cap or permanently bonding new hardware, this product eliminates the need for two-part epoxies and messy mixing.

Sikaflex® 291 LOT's extended open time allows precision work without rushed application—critical when aligning gunwales, setting cleats, or bedding through-hull fittings in challenging conditions. The non-sag formulation holds its position on vertical surfaces and overhead joints, preventing slumping that compromises waterproofing. As a moisture-cured system, it bonds and seals simultaneously, creating a flexible elastomeric joint that accommodates the thermal expansion and structural flex inherent to composite and metal boat construction. The black color provides aesthetic finish on dark hulls while remaining UV-stable in direct sun exposure.

This sealant excels for anyone maintaining or customizing center consoles, offshore platforms, kayak accessory mounts, and commercial fishing vessel components. The 3oz tube size suits targeted repairs and detail work without waste, and the included nozzle provides controlled application in tight spaces where larger caulking guns cannot reach. Cure time depends on ambient humidity and temperature; application on damp surfaces or during humid conditions accelerates polymerization. Compatible with fiberglass, aluminum, stainless steel, and marine-grade plastics, Sikaflex® 291 LOT delivers years of watertight performance when stored properly in cool, dry conditions.