No idea.

I've tried a few different fillers from home centers and never found one I really liked. This stuff is my second or third I've tried from a third party type outfit (aka Rockler, etc.) and I like it. There certainly is something even better, but since a pint lasted me several years, I haven't gotten around to the others yet😬

I looked at the CrystaLac website and it looks like it is a very similar product, even priced the same so it wouldn't surprise me if they are basically the same chemistry.