XLGC is your friend. It’s non acidic but works like a muriatic acid. It bubbles up on dirty grout like hydrogen peroxide does on dirty wounds. It’s made by XL north and it’s their Grout Cleaner. Don’t use it on natural stone as it will etch it. And don’t splash it on stainless steel for the same reason.
RideAndShoot t1_j9s3gn9 wrote
Reply to comment by keyserv in Tile installed on concrete by foxrue
XLGC is your friend. It’s non acidic but works like a muriatic acid. It bubbles up on dirty grout like hydrogen peroxide does on dirty wounds. It’s made by XL north and it’s their Grout Cleaner. Don’t use it on natural stone as it will etch it. And don’t splash it on stainless steel for the same reason.
Source: I’m a tile contractor.