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3M™ Marine Adhesive Sealant FAST CURE 4200 White. The adhesive sealant is extremely strong, retains its strength above or below water line. Stays flexible too - allows for structural movement. Has excellent resistance to weathering and salt water.High performance polyurethane adhesive/sealant becomes tack-free in 1-2 hours, cures completely in 24 hours.
Strong seal retains strength above or below the water line
Excellent resistence to weathering and saltwater