Heavy Duty Grime Remover For interior & exterior use Suitable for travertine, limestone, sandstone, slate, marble, porcelain, granite, terracotta, quarry tiles, brick & external paving. Effective for removing oil, grease, ingrained dirt grime and old wax layers. Important: - Test the solution on an inconspicuous area before general application. Any alkalinity remaining on surfaces treated with this product should be completely neutralised. This may be done with a little clean water applied by sponge.