I either you the fball stuff or the tremco gear, hate when I do have to use silicone and its the watery stuff (diy shed gear) prefer it to be more rubbery so that you cant/dont over smudge it so easily.
I can't get hold of it now (mario?) but I used to use Arbo silicone and it's fantastic to work with, it's what they use to seal up fishtanks and the like.
ok, leave it with me for a bit... I shall have a nose round see what I can find.. may come up with some samples of something...