Patio Black Spot Remover For Natural Stone

(8 customer reviews)

$131.56 (includes GST)

For use on Indian Sandstone, York Stone, Limestone (including Portland and Bath Stone) and for all other natural stone.
4 Litres: Maximum Area: 20 square metres.

SKU: NAT Category:


  • Supplied in liquid form, ready for use.
  • Pour straight into a standard garden pneumatic spray.
  • Biodegradable.
  • Coverage – not exceeding 5 square metres per litre.
  • Dwell time: leave for 2 hours.
  • Remove using a pressure washer with a fan jet.
  • Also kills green and red algae and white fungi growth.
  • Available in 2 and 4 litre containers.


Patio Black Spot Remover is currently the only product developed specifically to remove those hideous black spots and restore the natural stonework. Patio Black Spot Remover for Natural Stone will remove black spots from Indian Sandstone, York Stone, Limestone (including Bath and Portland Stone), Purbeck Stone and other natural stones.

To maintain your garden stonework and stop the return of the black spots, buy and apply our Patio Black Spot Preventer annually. This will kill any black spot spores before they have the chance to germinate and turn into spots and will also remove green algae without the need to power wash!

Reviews (8)

8 reviews for Patio Black Spot Remover For Natural Stone

  1. A. Coles

    Brilliant product, would recommend to anyone. Brought my 8year old natural stone patio back to life. Could hardly believe my eyes. Very impressed with the result and so glad that I decided to give it a go. Thank-you BSRC

  2. H Hall

    An amazing product. I wish we had found it sooner. It does exactly what it says it will. We sprayed our patio one afternoon and pressure washed it the following day. As we sprayed we could literally see it working. It has transformed our Indian sandstone patio – I had been so full of regrets about having it laid as it has looked so bad for so long and not responded to pressure washing – now with the Black Spot Remover it looks brand new again.

  3. Ian Rossington

    This solution works wonders. I was a little sceptical before I used it for the first time but after 2 hours I was amazed by the end result the patio looks as good as new now!

  4. Lynne Watkinson

    We are delighted with the result of the Patio Black Spot Remover. Our Indian Sandstone patio now looks like it did when we first had it laid over 10 years ago. We would have no hesitation in recommending this product and company to anyone. Thank you so much.

  5. Herts Maintenance Ltd

    Wow wow wow .. I used this product on my clients patio .. It’s a miracle worker .. Fantastic will be using all the time do not hesitate to but it will do exactly what it says on the tin !!! Thank guys.

  6. Peter Walker

    Superb results. Patio as new. Does what it says on the container.

  7. Ann

    I couldn’t believe the results! In less than one hour all the black spots had been removed. I left it on for as long as the instructions said and then rinsed. The colour of the stone was back to its original beauty… The back spot remover is in fact in my opinion worth every penny – the results were excellent – so much better than I expected by a long way.

  8. Chris Argent

    To say I was amazed at the results is an understatement, it looks like new and all the colours of the Indian sandstone, that I had forgotten existed, have returned.

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Shipping & Delivery



Goods will be delivered within 3 working days by Fastway. 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.



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.

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


  1. Use neat – DO NOT DILUTE – Pour our solution into a pneumatic garden sprayer. (A ‘Hozelock’ 5L or 7L sprayer is recommend. 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 just one slab first. The older the stone, the more treatments it will require. The product will remove every single last spot. By completing one slab 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 first slab, 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.