Batimust is stronger out of the two as it kills black spots and is usually more suited for porous surfaces such as sandstone or other similar surfaces. Once applied using a sprayer, both Batifast and Batimust need to be left on the surface for around 30 minutes then cleaned off using a pressure washer or a hose pipe and a brush.
Batifast should be diluted 50:50 which will cover 12m2, for heavy soiled areas it can be used undiluted which will cover 6m2.
Batifort can be diluted 50:50 which will cover 10m2 per litre or for heavy soiled areas it can be used undiluted which will cover 5m2 per litre.
If you need any further advice or information please don't hesitate to contact us.