Heat-Shrink Butt Splices
With a ring of solder on the inside, these heat-shrink splices create secure, water-resistant connections between wires without the need for a crimping tool. Instead, heat the splice with a heat gun or butane torch to shrink the tubing, seal the connection, and liquefy the solder. Because they use solder, these splices make more reliable connections than crimp-on splices.
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