Waterproofing GQ?

Hi all, I am new to 4x4 game, just wondering what needs to be water proofed in a rb30 GQ before you can dump it in the water? Dizzzy? Leads?
Cheers!

air intake snorkel .
also worth checking the gearstick surround .
Firewall for anywhere someone has added wiring etc make sure it is sealed up.
door seals

is there any tricks to sealing? what can be used to seal a dizzy and leads? or is there some sort of a kit you can get? I got no idea where to start, seems theres very little help online, i tried to google it already!

I just use a silicon sealant or whatever i have laying about lol ultra black usually.
Apply it just around the base of the cap then pull the lead boots back and silicon around them on the inside and push them on.
And wipe off any excess.

would you do the same thing around spark plugs and the other end of the leads on a dizzy?