I'm doing a rustic outdoor project and won't be using grout. Can I put colorant in Versabond? If so, any recommendations on the brand? Thanks!

That's really a question best left to the folks at Custom, although I suspect they won't want to endorse anyone messing with the mortar they produce. Masonry colorants are made to go in grouts and mortars, but I have never heard of using them in thinsets.

Why do you want to install your tile or stone without grout? Grout serves as more than just an aesthetic feature.

Thanks for the response! I'm doing an outdoor art piece where I am attaching objects such as small lightweight plates, utensils, pot lids, etc to a wooden wall. I'm now thinking about painting the wall with a wash and using liquid nails to attach the objects, rather than "stucco" it with Versabond and attach the objects.