Description Expell is an acid based paving stone/hard surface cleaner, that will remove Iron Stains. It removes the stains (rust discolouritation) caused by the iron in Granular & Liquid Fertilisers, as well as Sulphate of Iron. It can be used on all stones and paving including granite and slates. It is not suitable for use on highly polished natural stone. External use only Always advise to test on small area first, even though extensive tests have been conducted. Do not apply in wet conditions or when rain is forecast How to apply: Brush on using a hard bristle brush and leave for 1 hour Wash off, and brush vigorously to remove expell Avoid washing into grassed areas Wear PPE Heavily stained areas may need 2nd application.
