3M Marine Sealant 101 Chemically cures to form a firm, rubbery watertight seal. Non-sagging, non-shrinking formula becomes tack free in 5 hours and remains permanently flexible. Seals between mechanically fastened joints on wood, fiberglass, metal and most plastics; above and below the waterline. Excellent resistance to chemicals, weathering, salt water, and stresses caused by joint movement.
