$13
Home Depot has the 50-Pack DryConn 20136 Tan Low Voltage Waterproof Wire Connector for $13 with in-store pickup or $6 shipping to home. Used for making low voltage irrigation splices and comes pre-filled with a petroleum sealant that never hardens.
$13
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Comments & Reviews (2)

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swreynolds
Ben's cred: 1300
Posted 08/17/2015 at 09:26 AM PT
Posted 08/17/2015 at 09:26 AM PT
Interesting, these are not reusable but they have a special grease that covers the wires and makes the connection waterproof.
Out of stock online.
dave_c
Ben's cred: 5862
Posted 08/17/2015 at 10:44 AM PT
Posted 08/17/2015 at 10:44 AM PT
This would be a reasonable way to repair the typical (Malibu, etc) outdoor garden lights that have insulation displacement connectors which inevitably corrode and lose contact one by one.

That is, unless you're up to a more permanent fix which would mean soldering, heatshrink wrapping, and injecting a non-acid ("Sensor safe" automotive type) silicon sealant before shrinking the tubing. If you have multiple styles of heatshrink tubing with a glue lining then the silicone sealant may not be absolutely necessary but would still make it easier to achieve a waterproof seal.

Then again (lol) if you have the silicone sealant you can just put any standard plastic wire nut on and then pack the sealant in.