I just removed all the old (some grout/some silicone). The gap between the tile and fiberglass jacuzzi tub is huge in most places: 3/8" high and 3/8" deep. Should I use Phenoseal or GE SIlicone II and should I make a first bead to back fill the gap...let it cure a day and then add a second bead to seal the tile to the tub? My concern is that one bead would have to be super wide/thick to not get lost into the crevice. Thanks !