Just found these BUT packs of 5 
http://uk.rs-online.com/web/p/crimp-butt-splice-terminals/8719963/
These look good, prefilled
http://uk.rs-online.com/web/p/crimp-butt-splice-terminals/7643392/
ok, I think im gonna go for these its hard to tell how big and do i then just tape them to the mast?
Phone wires seem to work on the âtwo wrongs make a rightâ principle, crossover in the cable cancelled out by another crossover in the connector :lol:
Yeah, i had already made up the cables though before the couplers arrived :roll:
Those scotchloks are quite small, they only need protecting from direct driving rain, so yes, tape to mast will work. For a bit of extra protection I would make a drip loop - u-turn the wire from the sensor back up the mast for a few inches so that the connectors are pointing up when you tape them.
Brill, sounds like a plan to me, thanks, only another 8 days for the mast to arrive 
Yep, thats the way i have done it too. Of course a layer of tape around the whole thing would give even more protection but the tape-packet would need to be 110% water/moist-proof then wich is in de facto impossible when 2 wires goes inside it. The experience from my own fiddlings togethter with our wet/humid/frozen fall/winter where humidity stays at around 100% for months are that no protection at all are better than bad protection.
Well, if you really want it weatherproof 
Get a short length of plastic tube (e.g. pvc conduit), cap one end, fill it half way (or more) with hi-temp silicone electrical (dielectric) grease. Mount it open end down on the mast, u-turn the spliced wires up into the tube so that the spices and ends of the cable jackets are well in the grease. Tape/clip the wires to the mast, stuff the open end of the tube with rubber/plastic foam to keep it clean.
But the ones I have just bought are filled anyway 
Right, this is overkill for most hobby applications, but it will hold up longer than just tape. It does seal the ends of the cable jacket which is a good thing, moisture can easily wick a long way into the cable. You can also do the plastic tube thing without the grease, but whereâs the fun in that?
:lol: :lol: :lol:
They have finally arrived, wow, how tiny 8O
I donât know what I expected but just over a cm long and a cm wide, just glad they ainât big but wow, thatâs small
What about this ???
https://www.amazon.com/SMAKN%C2%AE-Waterproof-Coupler-Shielded-Installable/dp/B00M4UETJC
âsimply plug a patch cord into either end and screw together.â
âCut the connectors off the two patch cords. Thread the 2x cat 5 through the nuts and rubber seals and install new RJ45âs. Plug into each end of the connector and screw togetherâ
FTFY
Thatâs what I was looking for over here but couldnât find any, not to worry, think these tiny things will doâŚ
You understand how they work - right?
I believe so, 1 wire of the same colour from each cable, then squeeze, no need for removing plastic eitherâŚ
Exactly 
Try to use a big pair of pliers or a vice so that you get a straight squeeze and the colored bit doesnât go in at an angle.
Best do a few practice runs 1st me thinks so i get the hang them, theres no coloured bit on mine, i got some at a fraction of the cos of M3 ones
You didnât get these?