Gardner Bender 07315001126 LTB-400 Liquid Electrical Tape, Easy-on, Waterproof, Indoor/Outdoor Use, Jar, Black, 4 Oz Bottle, 4 Ounce

This product was used to seal a repair to an underground electrical to a telephone cable. It was easy to apply (3 coats, 1 day apart) and, so far, no problems after 2 months. Being bright red it was easy to see what parts had been treated.

This stuff is amazing, where has it been all my life!!! Goes on like thick goop, dries like electrical tape with ability to bend. Worked great on some older 12v electrical circuits where the insulation was cracking and exposing the wires.

Always on hand in my ham shack and laboratory for the purposes in the title. Brushes on quickly and smoothly, dries to handle in a relatively short time, and completely weather ready overnight. No failures here in any Texas weather from desert heat to panhandle snow and ice to hurricanes at the coast. HIGHLY RECOMMENDED.

I'd heard of this in a few places and decided to try it with my latest project. I purchased both the Black and the Red for 12V applications. It is fairly odorous so use in a ventilated area. I applied liquid relatively thickly so that it was opaque and it takes a little while to dry. It dried to a fairly flexible coating to stranded copper wire, adheres to silicone, cable nicks, other wire insulation and solder joints well. So far the compound has remained in place and has not torn or begun to peel in a couple weeks. I cannot attest to being a water proof coating, how it would stand up in abrasive locations or longevity so use with common sense.

It does what it says. Magic! Pity there are no instructions... but it really works. You will need a little brush as one in lid is far too big.