Found a reference in another group about Liquid Electrical Tape.
New to me ...but one brand is Permatex.
?Weatherproof protectant for wiring and electrical connections
?Goes on as a liquid and dries to a flexible vinyl polymer
?Resists dirt, dust, chemicals, and moisture, ensuring that connections stay intact
?Brush top applicator allows coverage without gaps
?Suggested Applications: Ignition Wires, Underground Wiring, Outdoor Lighting Fixtures, Bilge Pumps, Terminal Blocks, Exposed Wires
FYI / YMMV