OK, I spent my Christmas vacation removing the failing grout in my kitchen, dining room, foyer, hallway and laundry room - about 1,000 sq. ft. Based on input from this site, I replaced it with epoxy grout. Yeah, it wasn't a fun vacation, but the finished job looks GREAT!
Now, I've got a couple of small areas that I'm, not satisfied with, yes I'm something or a perfectionist at times. I've got pleanty of the sand left and it's cheap. But.....do I need to mix up an entire batch of the epoxy that comes in the kit - about $40.00, or is there some other type of epoxy I can get in small quantities to use? The tile place I got the epoxy kits from says no, I have to use the full amount. There are all kinds of epoxy's available from Home Depot in the glue area. Can I use any of them? Just hate to spend $40 to use $2 of material.
If you want it to match, it needs to be the same stuff, and it is best to mix the whole batch, since there are specific quanities in a batch. You don't have a lot of working time with epoxy, so the quanity can't be that much. But where did the sand come from, what was it for???
The product I used was Laticrete, Spectra Lock. You buy a set that comes with the 2 part epoxy, sand, and 2 cleaners. The smallest batch covers roughly 50 sq ft of my size tiles - 16", with a 1/8 joint width. Somehow I ended up with an extra carton of sand, it's only about $5 anyway. The 2 part epoxy that comes with the set is the most expensive stuff at $35 for the smallest size. So, to replace 1 tile, less than 2 sq. ft., do I need to buy enough epoxy to do 25 sq. ft? Seems like there must be a better way!