Great question — answering as the UphillTech team:
If the acrylic wall system you're going to do uses a kit, I would suggest not to do silicone and/or Kerdi-band behind panels as it will interfere with adhesives. Instead, tape the corners/transitions with paper or fibreglass tape and then install to manufacturer installation guides.
Full answer by Vertesol Eustache: https://diy.stackexchange.com/a/331215 (CC BY-SA 4.0).
Need it done for your business? UphillTech.
