Posted: Sat May 30, 2020 1:17 am
We have used Joint-It Simple to grout our Brazilian black slate patio pavers and it has ruined them, despite soaking with water, before and during use, an oily residue has been left everywhere, making the pavers look patchy and stained. Do you know of a product that is safe to use on slate and can remove? I'm very worried as oil can stain slate, which obviously has happened. We kept spraying and brushing the oily water off but it has still ruined our new patio. Thanks, Emma