3M Black Marine Adhesive Sealant 5200 3 Oz.

This high-performance polyurethane adhesive/sealant becomes tack-free in 48 hours, completely cures in 5 to 7 days with no shrinkage. The seal is extremely strong, retains its strength above or below the water line. Stays flexible too – allows for structural movement. Stress caused by shock, vibration, swelling, or shrinking is effectively absorbed. Has excellent resistance to weathering and saltwater. Easy to apply with a manual caulking gun. Remains workable with a trowel or spatula up to 4 hours after application. Will not sag or flow in vertical or horizontal seams.

• A permanent solution for bonding marine substrates like wood, fiberglass, and metal
• Polyurethane chemically reacts with moisture to deliver strong, flexible bonds
• Resists saltwater and weathering both above and below the water line
• Elastomeric bonds seal against the elements, maintain joint movement
• Non-shrinking – bonds dissimilar materials