Not sure about epoxy grout. Hombre will have to do some test runs first . Beaumont guy told us tilers run away from it cos not easy to use.
Hombre says silicone is supposed to be mould proof but it still gets mouldy. But silicone is easy to replace so that is okay. Anyway, we will have a go and see for ourselves what this epoxy grout is like. Ardex doesn't have epoxy in ultra white (they just have white) so we will use the normal grout and seal for our white tiles for our laundry and bathrooms.