Lots of this stuff on eBay as well in every color, size and length you can imagine. I even used a piece of 1" stuff under my grip heater elements. I find having red and black in both 1/2" and 1/4", 3:1 covers almost all my needs. It not only adds weatherproofing but physically integrity to the joint.As I have mentioned in another thread, what insulation covering you use on the splice is just as important - if not more so - than the method you use to do the splice. I use adhesive-lined heat shrink tubing whenever I can, especially for applications like motorcycle wiring that will see exposure to the elements. You can find it at most well-stock electrical parts stores. Harborfreight even sells them. Marine Heat Shrink Tubing Assortment With Case, 42 Pc. I've bought them there and they are of good quality. Only thing I don't like is that they precut to shorter lengths, which can lead to some waste. I prefer to get longer (4ft+) and cut to exact lengths I need.
It absolutely does. We use it a lot at work for industrial controls. I quite often spec it for making cable end connections, as it toughens the cable and acts as a strain relieve, right where the cable is stressed the most.It not only adds weatherproofing but physically integrity to the joint.