Sikaflex 291 Fast Cure Adhesive & Sealant (300ml) Cartridge - WhiteSikaflex-291 is a 1-component, marine grade polyurethane elastomeric adhesive and sealant. Used by many boat builders, its fast cure time makes it ideal for applications where speed is :General all-purpose, marine adhesive and sealant, which may be used for light duty bonding. Sikaflex-291 has excellent adhesion to gelcoat, fiberglass, metal and wood that can be gunned or brushed into & Advantages:Use above and below water lineResists salt waterFast strength build-upPaintable and sandableExcellent bondNSF approved for potable water (black and white only)USDA approved for incidental food contact