Sikaflex 291 Tube Black Marine-Grade Polyurethane Sealant 150ml

Sikaflex?-291 Black Marine-Grade Polyurethane Sealant 150mL is a premium, one-component, non-sag adhesive sealant specially formulated for marine environments. It cures on exposure to atmospheric moisture, forming a strong, elastic, and durable bond that resists saltwater, vibration, and weathering. Trusted by boat builders and marine professionals worldwide, Sikaflex?-291 meets International Maritime Organisation (IMO) standards for safety and performance. Features & Benefits Marine-grade polyurethane formula with superior adhesion Excellent weathering and saltwater resistance Elastic and vibration-resistant for long-lasting seals Low odour and non-corrosive composition Can be sanded and overpainted after curing Maintains flexibility across wide temperature ranges Where to Use Sealing and bonding on boats, yachts, and marine structures Deck fittings, hatches, and hardware installations Elastic, vibration-resistant joints above and below deck Bonding wood, metals, primers, coatings, ceramics, and GRP plastics Important Notes Not suitable for plastics prone to stress cracking such as Plexiglas or Polycarbonate Surfaces must be clean, dry, and free from grease or dust before application Recommended application temperature: 5°C to 40°C Technical Details Chemical Base 1-component polyurethane Colour Black Cure Mechanism Moisture-curing Density (uncured) Approx. 1.3 kg/L Shore A Hardness 40 Tensile Strength 1.8 MPa Elongation at Break 500% Temperature Resistance -50°C to +90°C (up to 180°C short term) Skin Time Approx. 60 minutes Shelf Life 12 months (stored below 25°C) Packaging 150 mL Tube For marine sealing and bonding you can trust, Sikaflex?-291 delivers professional-grade strength, flexibility, and durability on every project.