Amount of silicone around a bath mixer tap

How much silicone do you guys use around a bath mixer tap?


Here is a picture of the bath mixer tap in place



It has a hidden rubber O ring that goes between the base of the tap and the actual bath.




I will be using a good quality silicone (probably Dow Corning 485+ white).


a). No silicone at all and just rely on the rubber O ring.



b). A small amount that gets squeezed out as the taps bolts are tightened up (as a bit of extra backup for the O ring).



c). A decent sized bead like this.



d). Something else?

PS. I have a fugi tool, so my beads will be nice, not sh!te like in these drawings.

None. You don't use silicone at the base of a tap.

Cheers
Richard

You shouldn't need it if the tap/ring are decent. If you try using both, the o ring will just splay out when tightening the back nut. If concerned about leaks, you can always put a little silicon on the underside of the bath between the back nut and bath.