I'm installing a new single treshold 36x36 Swanstone Veritek fiberglass shower pan w/ matching walls. The install looks easy enough, but I have a question concering the seams. The walls are 3 pieces plus the Veritek shower pan. The instructions that came with the shower say nothing about how to seal the seams. It appears to me that the seams should need some kind of sealant (especially where the walls meet the shower pan at the base,since there is no apparent way to attach bottom of wall to the pan). There is no mention in the instructions of the use of any sealant whatsoever. Would appreciate any advise you could send my way! Thanks!