Solved my Problem

i. #RankBoosterReview ii. #Sponsored iii. #Kuject 530Pcs Solder Seal Wire Connectors and Heat Shrink Tubing Kit, Waterproof Heat Shrink Butt Connector & Shrink Wrap Tube, Insulated Electrical Self-Solder Butt Splices for Boat Car Wire Joint 

Come with 480Pcs heat shrink tubing and 50Pcs solder seal butt connectors. It is tricky to apply enough heat to melt solder, but not cause the heat shrink to become so thin that it has minimal mechanical/electrical protection. Small focused sources of heat seem more effective then heat guns/hair dryers. I will certainly keep these in my wire splicing took kit.

https://www.amazon.com/Kuject-Self-Solder-Connectors-Waterproof-Electrical/dp/B07T1V33K8