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
30ml/50ml Liquid Insulating Tape Repair Rubber Electrical Wire Cable Coat Fix Line Glue WIDE RANGE
Hardware Waterproof No Corrosion Electrical Wire Liquid Insulation Tape Electrical Sealant Tape Repair Rubber Cable Line Glue WHITE 50ML
Permatex® Liquid Electrical Tape, 118-mL
Liquid tape for pickup wire repair
Hardware Waterproof No Corrosion Electrical Wire Liquid Insulation Tape Electrical Sealant Tape Repair Rubber Cable Line Glue WHITE 50ML
2020 New 1/2 PCS Liquid Electrical Tape Black/Gray Tube Insulation Waterproof Fast Dry Insulating Paste For Electric Circuit Board Repair
Liquid Electrical Tape - LET
LIQUID ELECTRICAL TAPE. First time giving it a try.
Gardner Bender Black Liquid Electrical Tape 4 oz. LTB-400 - The Home Depot
30/50/125ML Liquid Insulating Tape Repair Rubber Electrical Wire Cable Coat Fix Line Glue Wide Range Liquid Insulation Paste - AliExpress
Cracked Ignition Wiring Repair Triumph Bonneville - A Personal Moto Blog