The Cable Joint Kit is recommended for all 2-cable connections because it creates a watertight seal that protects the light fitting from water ingress. The connectors are 'through-crimps' and the outside sheathing is adhesive-lined heat-shrink. They're available as single packs or packs of five. Where an underground 3-way connection is required, we recommend an IP67 enclosure and glands, or a junction box and hard-setting resin.