Patio Black Spot Remover for Block Paving

Patio Black Spot Remover for Block Paving will not only remove black spots but completely restores the original colour, whilst also removing all other forms of organic growth.

For use on Block/Brick Paved Drives, Patios and Pathways.
4 Litres: Maximum Area: 20 square metres.
2 Litres: Maximum Area: 10 square metres.

Patio Black Spot Remover is currently the only product developed specifically to safely remove those hideous black spots and restore the natural colour to garden stonework. Patio Black Spot Remover for Block Paving will also remove white fungi spots and algae. 

Using Patio Black Spot Remover will help maintain the life of your garden stonework. When you rely on pressure to clean your stonework, you risk damaging the bricks and removing the sand they're laid on. Patio Black Spot Remover gently restores the natural colours and lifts dirt and grime effortlessly making pressure washing effortless.

To maintain your garden stonework and stop the return of the black spots, moss and algae, buy and apply our Patio Black Spot Preventer annually. This will remove any black spot spores before they have the chance to germinate and turn into spots. It will also remove green algae without the need to power wash! The Preventer does not need to be applied until 12 months after the Removal process.

Patio Black Spot Remover is biodegradable and acid-free allowing you to wash the product into the flower beds and over the lawn without causing any harm. 

The coverage rate is based on a patio that is 3 years old. The older the stone, the more treatments will be required. Carry out a trial area (1m x 1m) first to determine the coverage on your stonework.

How to use

Prior to use, pressure wash the area to remove any surface dirt and loose debris. It is important the Patio Black Spot Remover comes into direct contact with the surface of the stone and the black Spots. Any surface dirt will reduce the effect of this product.


A dry overcast day when rain is not forecast is ideal. The product works when wet, if it dries too quickly the performance will be reduced.




1. Use neat – DO NOT DILUTE – Pour our solution into a pneumatic garden sprayer. (A ‘Hozelock’ 5L or 7L sprayer is recommended. Do not use a hand sprayer.) Pressurise the sprayer.
2. Apply the product to a dry surface, as a fine mist and saturate the surface.
3. If you have not used the product before. Treat a small area first (1m x 1m). The older the stone, the more treatments it will require. The product will remove every single last spot. By completing a small area first, this will give you an indication of how many treatments your stone will require. Only when you have removed all the black spots from the trial area, continue with the rest of the area.
5. Once applied, allow to cure for a period of 2 hours.
6. Remove using a pressure washer, ideally with a minimum flow of 7 litres per minute. Use the fan jet attachment to sweep the dirt away. Other attachments such as circular spinning attachments will not give you the best results.
7. Any black spots that remain, simply retreat (when the surface is dry) allow to cure for 1 hour then wash off.
8. Repeat this process until no black spots remain.
9. Apply the Patio Black Spot Preventer 12 months later. Do not seal the patio.

Exceeding the recommended coverage rate will reduce the performance of this product. Coverage will vary depending on surface porosity and profile, e.g when treating sloping areas or riven surface, beware of surface run off and retreat as necessary to ensure correct coverage.

The Patio Black Spot Remover is quickly and readily biodegradable. The effluent if washed into soil, flower beds or lawn will breakdown rapidly. This product will not affect surrounding lawns or foliage in diluted state. Keep animals and unprotected persons off the treated area until dry.

Ensure product doesn’t come into contact with skin, eyes or respiratory tract. In the event product does comes into direct contact with the body, immediately rinse with water. Ensure this product does not come into contact with fabrics or furnishings.

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