jsut had my wheel redone and coated just rebuilding them, am i right in think just bolts them up then seal in the groove where all three bits meet?

no need so sealent near bolts or anything like that

I used a good quality (Unibond) Silicone sealant on all the mating surfaces.

One did lose air after but this was down to me torquing the bolts up to 15 lb/ft and snapping the heads without knowing

Redone this one and all is fine now.

Hope this helps.

Cheers,
Iainl

i bet a soft non-setting plumbing compound would be fine to seal it, would certainly be easier to take apart! Silicone is phenominally difficult to break when there is a big area stuck.

I was going to suggest a non-hardening gasket compound like Hylomar blue. I hate silicone sealer, it's an absolute bugger to remove.