In mild cases and on absorbent tiles: Dilute 1 part Grout Stain Remover in 4 parts cold water.Apply with a cloth or sponge wrung out in the solution. Wipe off thoroughly with a clean damp cloth. In more severe cases: Dilute 1 part Grout Stain Remover in 1 part cold water. Apply liberally and spread over surface of tiles. If necessary, agitate with a nylon scrubber and leave to react for five minutes, keeping wet with additional Grout Stain Remover solution. Mop up and rinse thoroughly with clean cold water. In extremely severe cases: Use undiluted and agitate with a nylon scrubber or mechanical scrubber if necessary. Neutralise treated surface with clean cold water after use
Important: Always test on a small inconspicuous area prior to general application.
Do not use on Limestone, marble or other acid sensitive surfaces.