● oxydation free
● you can buy a burner here.
If you need a connector with the longest life spand, then you need a heat shrink connector. It will protect the cable for many decades, and will leave the cable 100% oxydation free. It is highly recommended for professionel installation use, and also for repairs.
If you dont got a heatblower or like to have a portable heat shrinking tool, then you can buy it here.