My dog wee on the tiles, terracotta tiles, then I tried to take them off, I brush the marks with detergent and left it before I washed it, but when it dried up , the white marks just get bigger and the tiles now in that area looks faded colour compared to the other part. Can anyone help me if I can buy in bunnings terracotta sealer or do I need to get a person to do this, I hope someone can help me. Thank you


