401 Brick & Patio Cleaner is a fast-acting acid-based formula (9.5% strength) that dissolves mortar and cement stains, ingrained dirt and paint on most mineral surfaces such as brick, stone, concrete, paving flags and earthenware.
 
Please note this product is only suitable for external applications.
 
Acid-based – powerful cleaning action
Water clean up
Economical in use
1L (neat) will clean up approx. 10m² of surface stain