QUESTION
Changing Grout Color - have grey grout in between black slate - what do i use to change the grout to black - to match slate
ANSWER
ANSWER - There are epoxy grout colorants that can be used to treat the grout joints. They do have applicators to make it easier to apply. It is important to properly prepare the grout prior to applying the grout colorant. Here is one company that provides them:
www.groutcolorants.com. Good luck.