3M 4000 UV Polyether Adhesive Sealant Black -
Resistant to weathering, salt water and stresses caused by joint movement. White, non-yellowing formula is ideal for above and below waterline applications where aesthetic appeal is a priority. Seals between mechanically fastened joints on wood, fiberglass, metal and most plastics. Applications include sealing deck to hull joints, thru-hull fittings, window and door frames,etc. It is also paintable. Highly recommended for ABS, Lexan and other plastics.