100 pcs Heat shrink connector with tin and 100% waterproof.
Long-lasting connection. ● Oxidation free ● You can buy a first-class burner here.
If you need a connector with the longest lifespan, then you must use a heat shrink connector. It will protect the cable for many decades and will leave the cable 100% oxidation free. It is highly recommended for professional installations, and also for repairs.
If you don’t own a heat blower or if you would like to have a portable heat-shrinking tool, then you can buy it here.