I have read on the BuildHub forum both CT1 and Sikaflex is often recommended instead of using conventional Silicone sealants when installing a shower tray. I am about to install a Zamori 1700 x 800 walk-in tray (Acrylic steel framed) with a fixed glass panel but am unsure whether I should use both CT1 & Silkaflex and if so where is each best suited to do the job best? http://www.zamori.co.uk/Features   I was recommended the Zamori Acrylic tray below by a local plumber as