I think the question is whether they have a bad reaction to certain chemical or a bad reaction to the thought of certain chemicals?:jester:

Had someone not want me to bring sand into their house because of silicosis. Mind you, I was going to put it between the pavers on the greenhouse addition............................
People need to realized that there are solids and a carrier, loosely spoken. Glue is 'chemicals' and a carrier--or else it wouldn't flow. Paint is chemicals and a carrier or it wouldn't flow. Thinset/grout is chemicals and a carrier, or it wouldn't flow. Caulk is chemicals and a carrier...or it wouldn't flow.
So once all this junk and stuff is flowed out and applied, what happens to that flowability? The carrier either evaporated and pissed off liberal/progressives (VOCs) or it evaporated, but still annoyed them (water) somehow. Any chems now have done their work and are now set. The chems are now encapsulated and/or gone. Didn't there used to be a suggestion with OSB to let it air out for a while so the glue's bad chems would leave and go to california or something? Heck I dunno, just guessing as I'm just an email account on the internet.
Speaking of which....if anyone is hypersensitive to anything, you're correct....go to the manufacturer and compare notes directly.
Or I guess go to a DIY website and let them tell you to use kerdi or ditra ..... :laughing: