Sika Sikaflex® 291 LOT Slow Cure Adhesive & Sealant 10.3oz(300ml) Cartridge - Black

Sikaflex® 291 LOT Slow Cure Adhesive & Sealant in black is a 1-component, marine-grade polyurethane elastomeric adhesive and sealant designed to deliver durable bonds and lasting seals in demanding maritime environments. It cures with moisture, remains permanently elastic, and provides reliable performance in challenging conditions.

As a moisture-cured, non-sag system with a long open time, Sikaflex® 291 LOT is ideal for projects that require extra working time for precise alignment — even in humid climates or complex assemblies that must stay elastic after cure. This versatile sealant is suitable for both above and below water line applications.

Key features

• 1-component, moisture-cured polyurethane elastomeric adhesive and sealant
• Marine-grade, non-sag formulation with long open time
• Use above and below water line
• Resists salt water and weathering
• Paintable and sandable for a seamless finish
• High-strength bond with permanent elasticity
• NSF approved for potable water
• USDA approved for incidental food contact
• Black color; 10.3 oz (300 ml) cartridge

Ideal for boats, decks, hull joints, and other marine applications that demand a durable, flexible sealant and adhesive that performs over time.

Safety and approvals

Warning: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, see P65Warnings.ca.gov.

• NSF approved for potable water
• USDA approved for incidental food contact