Patio Black Spot Preventer For All Stone Types

(1 customer review)


For use on all stone types. Patio Black Spot Preventer will prevent patio black spot infestation on terraces and pathways.
This product will treat a maximum area of 50 square metres.
For application within 12 months of the Patio Black Spot Remover.

SKU: PRE25 Category:


  • For use on all types of stone.
  • Dilute 3:1 (Water / Preventer).
  • Apply with a 5 or 7 Litre pump up sprayer.
  • Kills black lichen spores before they can germinate.
  • Algae disappears within 3-5 days.
  • Removes the needs for power washing every year.
  • Offers complete protection when used annually.


Patio Black Spot Preventer will prevent patio black spot infestation on new terraces and pathways. When used annually, Patio Black Spot Preventer will also prevent re-infestation of black spots after they have been removed with our Patio Black Spot Remover. It specifically targets the black lichen spores, killing them before they can germinate, avoiding the use of harmful and impractical pesticides.

Patio Black Spot Preventer will also kill green and red algae that grow on garden paths, patios and other decorative stonework.

Reviews (1)

1 review for Patio Black Spot Preventer For All Stone Types

  1. Cliff

    A year on and the results are still stunning. We are ordering more for our neighbours and maintenance product for ourselves. I have tried loads of different products and this is the only one that actually does what it says on the website and plastic containers. Amazing!

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Shipping & Delivery

Shipping costs for mainland UK is £3.99 + VAT. Goods will be delivered within 3 working days maximum by DPD. Once your order has been prepared for dispatch, an SMS and email will be sent advising you of a 1-hour delivery window.

Please examine the goods on arrival, prior to signing for delivery. If the goods are damaged, please reject the delivery and report to the office immediately. The product and storage is your responsibility once signed for. Store upright, in a cool, dry place, away from direct sunlight.

Shipping to Guernsey and Jersey is £20+VAT. Shipping to Isle of Man is £30+VAT - Allow 7 working days. Shipping to Ireland is £25+VAT. Shipping to France, Germany and Spain is £35+VAT - Allow 10 working days.



Prior to use, sweep the surface to remove any loose grime and dirt that may protect the Lichen from treatment by the Patio Black Spot Preventer.


Ensure this product does not come into contact with fabrics or furnishings.


  1. Fill a pneumatic garden sprayer (Hozelock 5 or 7 Litre) with 3 Litres of water / 1 Litre of Patio Black Spot Preventer. (3:1).
  2. Pressurise the sprayer.
  3. Apply the product to a dry surface, as a fine mist and saturate the surface.
  4. DO NOT EXCEED 5 square metres per litre (once diluted).
  5. Allow to cure – DO NOT WASH OFF – the preventer will kill any sports that have landed in the last 12 months and green algae will disappear within days 3-5 days, without the need to pressure wash.

2.5 Litres of Patio Black Spot Preventer will treat 50 square metres (5M x 10M). Use annually for complete protection, where any green algae appear during the year, around the down pipes and drains, treat locally. You do not need to treat the whole area.

Say goodbye to constant pressure washing. Once you’ve used our Patio Black Spot Remover, an annual application of The Preventer is all you need to keep your patio looking its best long term. It doesn’t even need spraying off!