When working on outdoor electrical projects, the integrity of your connections is paramount. Standard wire nuts, while effective indoors, can quickly become a weak point when exposed to the elements.
Kyocera AVX has created a series of waterproof poke-to-insert wire-to-wire connectors. It rates its 9289-000 series as IP67, and is aiming them at industrial, transportation, commercial and consumer ...
There are many types of wire connectors out there but these are some of the most common ones you'll encounter.