Hi, Mark/Troy,

The Custom Building Products stuff at the Home Depots here in NC is called "Polyblend".....it says "polymer-modified" on the bag.

That's the name of the grout and I believe the thinset is called the same. I have used it a number of times and it seems to work well and consistently for me.

Mark, I can't make out some of the ingredients on this old chewed-up bag I've got but I don't see latex mentioned....I can make out only a line or two....the rest is rubbed off.