Patio Black Spot Preventer For Artificial & Natural Stone - 2.5L

Unlike standard cleaners, our Patio Black Spot Preventer works proactively to protect your surfaces from future damage, maintaining the natural colour and appearance of your stonework. It's a safe, effective way to stop stubborn staining and keeps slippery areas under control.

Patio Black Spot Preventer is pet-friendly. We recommend you keep pets off the area whilst applying the product. Once dry, it's instantly safe for pets to walk on the area. 

Application Instructions 

1. Choose the right day – Apply on a dry day when no rain is forecast for at least 48 hours. 

1. Mix the solution – To treat 20m², fill a 5–7 litre garden sprayer with 3 litres of water. Add 1 litre of Patio Black Spot Preventer (always add the Preventer to water to avoid bubbling). 

1. Apply generously – Spray evenly across an area no larger than 20m² (4×5 metres) until saturated. 

1. Repeat as needed – For larger areas, mix fresh solution and repeat until all paving is covered. 

1. Allow to dry – Do not rinse off; simply let the surface dry naturally. 
   
   

Maintenance Tip: If stains caused by green algae appears in shaded or north-facing areas during the 12 months after treatment, simply apply to those areas for ongoing protection and safety.