One Outta Four Are Poor Odds...

[steve dunham]

Originally Posted by padlin

Thanks, do I need to waterproof it or is the heat shrink good enough?

They make a shrink tube where the inside is coated with a melt able sealer
When you heat the tube to shrink it the sealant melts and makes it watertight

If I can’t find shrink tube with silicone sealant , I have used crimp sleeves filled with Pentrox electrical grease .
Crimp the sleeve with a T&B indenter crimper , tape over the crimp sleeve with 3M - 130C high voltage tape ( 1/2 lapped and stretched to the 50% requirement)
Put shrink tube in place over splice / tape and heat .