Liquid Electrical Tape can be used instead of insulation tape.
Simply brush it on and it will insulate and seal out moisture. Once
dry, it is acid and salt resistant and won't crack, peel or harden
even under extreme conditions. This is a very versatile
Liquid Electrical Tape Tube 28g can be used for
such diverse applications as stopping screws from vibrating loose
or ropes unravelling. The 'tape' is supplied in a handy 28g tube
(1oz) and comes in red and black.