The black spots that grow on your garden stonework are actually spots of black lichen! The spores from the black lichen start life as tiny dust-like spores growing on the underside of leaves on trees and plants.

These spores are carried by the wind and the rain onto your stonework in their millions. Once they have landed the spores have a two-year germination period. So for the first two-years of your patio’s life it will remain looking really clean. In year three the colour in the stone will start to look dull and look like someone flicked ink across your stonework leaving tiny ink splatters. The reason why they grow on your garden stonework is because they feed off the minerals within the stone. Once they have exhausted an area of the stone of all its minerals they grow in search of more. Not only do they spread across the stone giving spot like appearance, they also burrow down into the stone at a rate of 2mm a year.

Encouraged by warm, damp conditions, these unsightly spots will only get worse if left untreated, ruining the original beauty of your garden stonework.

Black spots are incredibly resilient and can’t be removed by pressure washing. So if you’ve tried washing your stonework and the spots remain then there’s your answer. Take a look at the pictures on our site. Look familiar? Black spots it is!

Our Patio Black Spot Remover has been specifically developed to remove black spots. It’s not your standard patio cleaner; it targets patio black spots and restores the natural colour.

You certainly can!  – you can buy it yourself in our online store then apply it easily to your patio.

You must use a 5-7 Litre pneumatic pump sprayer. These are typically £30-£35 from your local garden centre. Apply the product like a fine mist and saturate the area. Any questions after completing the trial slab, give us a call on 01252 702123.

If the stone is dirty with no visible colour, yes you should pressure wash before. For the best results, ensure the product comes into direct contact with the stone and the ‘black spots’. The product is biodegradable, if you apply it to dirt, it will not work.

They will if you use our Patio Black Spot Preventer annually. Using Patio Black Spot Remover followed by a thorough jet washing is enough to remove the spots in the first instance.

Yes. Biodegradable and animal friendly, the Patio Black Spot Remover is not harmful to flowers and plants, and is safe for family pets. Please avoid spraying any neat product directly onto plants and the grass. In diluted form, it will not cause any harm.

Please be careful when using the product close to fish ponds. You must avoid all the run off from entering the pond as it would harm any aquatic life. If a small amount of the product enters the pond it would not cause any issues.

We recommend pressure washing first, this way you remove most of the surface dirt which is usually what requires the most amount of water. Once dry, apply the product and lightly wash off afterwards, this way there is less contaminated run off. We recommend using sandbags to stop the flow of water. We have carried out several applications around fish ponds like this with no issues. 

You wouldn’t need to use the Remover every year. Only for the initial treatment. The Preventer which you apply 12 months later is a spray and leave treatment so wouldn’t cause any issues with the pond.

Patio Black Spot Remover is unlike any other product on the current market as it is the only product that can remove black spots from your garden stonework with almost instant results. It will not only remove the black spots but ALSO remove white fungi spots and restores your stonework, giving it that ‘just been laid’ look. PBSR has been on the market for over 10 years. Not once have we met a patio we're unable to remove the spots from. We use our products every day and know how to get the best results.

NO! Never apply Patio Black Spot Remover when the day temperature is below 5°C and never use if the temperature is likely to dip below freezing overnight. The surface MUST be dry or the product will not work.

All deliveries are sent out for next-day delivery by either DPD or Parcel Force. We dispatch Monday - Thursday.  Orders will be dispatched the following day as 'next day delivery'.  Please note, we do not dispatch on a Friday.  Therefore, orders placed on Thursday will arrive on Tuesday.

If you have provided an email address and mobile you will receive a text or email giving a one-hour slot on the day of delivery.  If you are unable to be in, please use the link, in either the email or text and provide a safe place for the package to be left. 

If DPD attempts delivery and nobody is in and no safe place has been provided your package will be delivered to a local pick up shop. You will have 5 days to collect the parcel before it is returned to us.

PLEASE NOTE: DPD used to attempt delivery three times but have changed their process as this is better for the environment.  Pick-up shops allow customers to retrieve their goods in the evening if they have missed the delivery.  This is useful if required for the following day or before the weekend.

If you spray the product directly onto plants, it will scorch them, it will not kill them. If you spray the product onto stone as intended and wash off over the lawn and into the beds, it will not affect the grass or your plants. Patio Black Spot Remover and Preventer are safe to use around Artificial Grass.

No, we do not stock our products. All our products are distributed from our depot which is not open to the public. Online orders only.

Store in a cool, dry area away from direct sunlight. Shelf life up to 18 months if stored correctly.

Yes, you must wear chemical resistant gloves (EN374), safety glasses and a mask to ensure product does not enter the respiratory tract. Wellington boots are also required. A respirator is not required. The product will stain fabrics and furnishings so make sure you’re not wearing your best clothes.

Rinse with water immediately (ideally warm water). If your clothes become contaminated, remove immediately.

Download: REMOVER safety sheet; PREVENTER safety sheet.

Yes! Head over to - www.patioblackspotremovers.com

Yes - Patio Black Spot Remover for Artificial Stone can be used on Composite Decking. The Patio Black Spot Preventer can also be used annually.


Call us from a landline or mobile on 0800 500 3032 / 01252 702123.

If you’d prefer to leave it to the experts or are unable to do it yourself then our specialist team of trained technicians are ready and waiting to apply it for you.

Visit the 'Contact us' page and send us a message. We will be able to advise you further. Alternatively, please call us on 0800 500 3032 or use the online chat in the right hand corner.