Heat-shrink tubing is a shrinkable plastic tube used to insulate wires, providing abrasion resistance and environmental protection for stranded and solid wire conductors, connections, joints and terminals in electrical wiring.
This is a high quality material which shrinks to 1/3 its size.
It can be stored for extended periods of time without shrinkage.
It remains flame retardant, and is very flexible.
When heated, the sealant flows and physically encapsulates, creating a waterproof connection.