Check out this how-to-use Black Spot Remover video.
To clean your patio you will need:
• STONTEX Black Spot Remover 5l
• A Yard Brush
• A Power Washer or a garden hose with a high-pressure head.
1) Remove any loose vegetation from the patio area and WET your patio
2) Apply neat Black Spot Remover to your patio
• Use a watering can rose if you have one to spread the Black Spot Remover evenly.
• 1 litre of Black Spot Remover should cover 5m2 of patio.
3) Brush the patio with a yard brush to work the Black Spot Remover into the patio
4) Allow Black Spot Remover to soak in the patio for 2 hours.
• For very heavily stained areas follow step 1 to 3 again but leave the product on the patio overnight before washing it off.
5) Clean the patio with a power washer
Be careful not to damage the grout with the power washer.