Sikaflex(R) 291 Fast Cure - Black - 3oz Tube Sikaflex(R) 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 important. Sikaflex(R) 291 is manufactured in accordance with IOS 9001/14001 quality assurance system and the responsible care program.Features:General purpose polyurethane marine sealantFast curingAbove and below water applicationsIdeal for sealing thru hull and hardware applicationsExcellent adhesion to GelcoatResists saltwaterWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.