Same as Adhesive - Howtex/Weber here. Because its what my tile shop sells me. As it works a treat I have had no reason to doubt them - its cheap and works really well.
Got sold some BAL 2 part stuff for a small basin top recently - hated it - yuk. I must admit it was very white, and no doubt doesn't attract mould etc. But I hated cleaning it up. Its so oily. Ended up using some washing up liquid to get rid of the it, where it had marked the floor, as just rubbing with water just smeared it all over the place. Won't be rushing back to use it. Far prefer the Howtex stuff.
Paul
PS - anyone know the connection between Weber & CTD? Every time I've asked about Weber in CTD they always quote "we own that company - however we don't stock their stuff" Is that true? That they own them - I wonder? Would seem weird if they do - as they don't stock it.