Reddit reviews Laticrete SpectraLOCK Pro Premium Mini Parts A&B, 2lb (0.9 kg)

Just a heads up, type a persons name like u/cursedsun or u/djinnisequoia in a post if you want them to be tagged in it, or ensure you're hitting a reply to one of their comments.

Home depot apparently doesn't stock epoxy grout (may have it in store but the website doesn't list it). Lowes does.

https://www.lowes.com/pd/MAPEI-Kerapoxy-CQ-1-Gallon-Charcoal-Sanded-Epoxy-Grout/1000128021 - I've used Mapei's kerapoxy in the past and it's good stuff.

https://www.amazon.com/Laticrete-SpectraLOCK-Premium-Mini-Parts/dp/B00FAU3YH6/ref=sr_1_1?ie=UTF8&qid=1525066258&sr=8-1&keywords=kerapoxy - offering from Laticrete, just a forewarning though I seem to recall a thread on the john bridges forums (tile specialist forums, basically) where tilers were having issues off and on with this product. Can't remember exact details though to be honest.

Alternative option, find a tile supply specialist store in your area (a lot of tiling specific vendors will have a range of products, but big flooring firms/companies that have a "tile section" may not, or their products may not be suitable, and I definitely would be hesitant to tell you to listen to any advice from a place where they don't specialize in tiles). Go in and ask them about epoxy grout offerings, and they may have some other useful advice for you too.