One of my pickup's wires is pretty short, I've had to splice in wire. After soldering the wires together I've usually wrapped the splice solder point with electrical tape. I also got some of this
Liquid Insulation Tape Repair Rubber 30/50ml For Electric Wire Adhesive Coating
1x Liquid Insulating Tape Repair Rubber Electrical Wire Cable Glue Coating
LIQUID ELECTRICAL TAPE. First time giving it a try.
LIQUID ELECTRIC TAPE 113.4 g 893.198010
Hardware Waterproof No Corrosion Electrical Wire Liquid Insulation Tape Electrical Sealant Tape Repair Rubber Cable Line Glue WHITE 50ML
LIQUID INSULATION TAPE Electrical Sealant Tape Repair Rubber Cable Line Glue $6.18 - PicClick AU
Liquid Insulating Tape Repair Rubber Electric Wire Adhesive Coating 30/50ml Fp
50ml Liquid Insulating Glue provides a strong, durable, airtight and waterproof dielectric seal. Capacity: 50ml. Color: black, white.
50ml Waterproof Liquid Insulating Tape Repair Rubber Electrical Wire Cable Glue
Liquid Electrical Tape Liquid Insulation Electrical Tape - Temu