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
<(Amazon.com product link shortened)>
FYI / YMMV