I has a leaky pillar!

[mark_airey]

If you unbolt the aerial and run some sealent around the base then yes. You may aswell fit a new base then tho. but personaly i wouldnt just seal around the out side of it as it will look gash :/ as said above aswell check sunroof drainage as could also be this

By "seal outside" I don't mean to just run a bead of silicone around the outer edge of the aerial base like you seem to be implying as already said by Connor, if you remove the base and put a bead of silicone underneath and refit you won't see it so it can't look "gash" really can it.............it will look the same as before, just won't let water in anymore if done right