Clear CT1 for that. White silicone will tear and come away if there any movement whatsoever.  DONT USE WHITE CT1! It will go custard yellow  If you want a cosmetic ( coloured ) finish simply tool / baby wipe + MultiSolve spray the excess clear away and allow to cure, THEN top coat with a silicone. You simply peel that off every time it gets grotty and the CT1 stays mint for life underneath.