Just fitted a large and heavy stone shower tray onto a mortar bed. I forgot to run silicon sealant around the edges, before tanking with liquid latex and adhesive repair tape from Aquaseal. The tape overlaps onto the shower tray, making a waterproof seal all around it. Do I now need to cut the tape, put silicon sealant in the gap between the shower tray and the wall, and then re-tape and tank? Expensive given the price of the tape, and it looks to me like I have a good waterproof seal now.