The most critical aspect of a high quality wire splice is maintaining excellent electrical conductance along the wires and preserving electrical insulation between the wires.   To insure these features, Apogee recommends our cable splice kit. This kit includes solder sleeves to make two splices of our three conductor cable (including the drain wire).  The kit also includes polyolefin heat shrink tubing with internal adhesive to waterproof the exterior.  Our testing indicates that cable splice joints made with this heat shrink tubing are nearly as waterproof as the original cable.  These splices are mechanically rugged, but splices are typically less strong than the original cable.  Jerking a wire that is securely fastened at both ends is more likely to cause separation at the splice than the original cable. (Please note: Solder sleeves contain lead and are therefore not RoHS compliant)