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Transform your patio with our Patio Black Spot Remover for Natural Stone – the only solution developed specifically to tackle stubborn black stains, helping break down discolouration while restoring the natural beauty of your garden stonework.
Patio Black Spot Remover can be used on Indian Sandstone, York Stone, Limestone, Travertine (including Portland and Bath Stone), and all other types of natural stone. This powerful treatment removes stubborn black staining from patios. It works deep into the surface to revive the original colour and texture of your stone, leaving your patio looking fresh and renewed after pressure washing.
Available in two sizes:
4 Litres – treats up to 20m²
2 Litres – treats up to 10m²
Unlike aggressive pressure washing, which can damage the stone surface and dislodge pointing, our patio black spot remover for natural stone gently lifts dirt and grime, making any follow-up cleaning effortless. It helps prolong the life of your stonework while delivering results that standard patio cleaners cannot match.
To keep your stone looking its best year after year, follow up with our Patio Black Spot Preventer. Applied annually, it will prevent staining and discolouration and remove green algae within days without the need for power washing. The Preventer should be applied 12 months after the initial removal process.
Safe, biodegradable, and acid-free, our formula can be rinsed into flower beds or lawns without harming plants, making it both effective and environmentally responsible.
Patio Black Spot Remover is safe to use around pets. As a precaution, we recommend keeping pets off the area whilst applying the product. Once the Remover has been washed off the surface, it’s instantly safe for pets to walk on the area.
Coverage Tip: The coverage rate is based on a patio around 3 years old. Older or heavily stained stone may require additional treatments. Always test on a trial slab first to gauge results for your surface.
Using a 5-7 litre pump up garden sprayer. We recommend the sprayers made by hozelock and IK. You can purchase these sprayers on our website.
Patio Black Spot Preventer should be applied within 11-12 months of using the Patio Black Spot Remover. The best time to apply Patio Black Spot Preventer is in spring. The Preventer can also be used on brand new stone within 6 months of installation.
Yes, the Remover can be used on stone of any age. On older stone, re-treating will be required as the stains become harder to remove as they’ve had longer to establish themselves. Carry out a trial slab first to check how many applications are required BEFORE proceeding with the rest of the area.
Yes, the Remover can be used on Limestone, sandstone, Yorkstone & granite including any other types of natural stone.
White spots can be removed with using a high-powered pressure washer. You must be careful using high-powered pressure washers because they can remove the finish on paving slabs and delaminate natural sandstones. A light pressure wash will remove these white spots after applying Patio Black Spot Remover, without the risk of damaging your stone.
Spots on your patio can be stubborn and be present not just on the surface but within the stone. Some spots are unable to be removed from natural stone with just a pressure washer.
Pressure washing becomes less effective over time due to different types of organisms that land on your stone throughout the year. Some organism’s grow during wet periods, such as algae. Most patios in the United Kingdom suffer from algae, lichen and moss at different times of the year. This can cause stubborn staining on your patio that pressure washing will not remove. When you pressure wash stone, it opens the pores of the stone allowing organic growth to grow quicker. You’ll find 4-5 years after laying a patio that pressure washing becomes less effective.
If you have stubborn black spots on your patio, you should use Patio Black Spot Remover as soon as possible. The longer you leave these stains, the harder they can be to remove. Patio Black Spot Remover will work on stone of any age. Re-treating can be required. Do not use when the temperature is less than five degrees.
1. Apply with a pump up garden sprayer. 2. Leave for 2 hours. 3. Wash off with a pressure washer. 4. Re-treat any stubborn staining. 5. Apply Patio Black Spot Preventer 11-12 months later.
A pump up garden sprayer. These can be purchased on our website.
The only difference in the Patio Black Spot Removers is the viscosity of the product. You will still get good results if you use the incorrect Remover for your particular stone.
We sell two types of sprayers on our website. A cost effective Hozelock 7 Litre sprayer or an IK 6 Sprayer which is the same sprayers as our site team use when visiting your property.
No, you do not dilute, the product it is applied neat to the stone.
Yes, Patio Black Spot Preventer should be diluted and applied to all areas 11-12 months after using Patio Black Spot Remover
Yes, you can re-apply the Remover if you have stubborn stains immediately after washing the first application off. Let the stone dry out before re-applying.
We recommend pressure washing after application to get the best results and remove any surface dirt on the surface.
Yes. If you spray the product directly onto your stone and avoid neat product coming into contact with plants and grass, no harm will be caused. The runoff, once diluted is fine to be washed into your flower beds and over the lawn. Patio Black Spot Remover & Preventer is safe to use around Artificial Grass.
Yes, both these products are safe to use around artificial Grass.
When using the Patio Black Spot Remover, you must ensure that the runoff doesn’t go into the pond. It would be fatal for the fish. We recommend using sandbags to stop any runoff from entering the pond. It's good practice to pressure wash first, allow the area to dry, then apply the product. Meaning when you wash the product off, you aren't using as much water to wash the product off as you have already cleaned the area. The Patio Black Spot Preventer is a spray and leave treatment therefore, no issues with using that next year near fish.
Our products have been on the market for over 14 years. Not once have we come across a patio we can't remove the spots from. We also offer the service, using the same products, and guarantee to remove all the spots. We carry out between 800-900 jobs annually. We recommend starting with 1 x 4 litre and carrying out a trial slab first. Continue to treat the worst slab you have until all the spots have been removed. You will then know what is required to complete the rest of the area and have the confidence the product works.
Yes, our products can be used on your house. We use this product on client's properties all the time. As you're treating a vertical surface, we would recommend applying the product using the same sprayer BUT applying 2-3 light applications (leaving 15-20 seconds in between treatments) so the product doesn't run off. If you apply too much at once, the product will run off and not be very effective.
The product has to be applied via a 5-7 litre garden sprayer. Therefore, you will need 1-2 Litres minimum for it to work using the sprayer. The 2 Litre container is the cheapest way to test the product. You can get 10% off your first order by subscribing and delivery is free of charge. If you apply it correctly, it will restore the colour and remove all the stubborn staining. It may need more than one treatment if it's an old surface, but it will remove all the spots. In 12 years, we haven't come across a patio we can't remove all the spots from. We recommend concentrating on one slab first until you have removed all the spots before proceeding with the rest of the area.
Call 0800 500 3032 or send photos to info@pbsr.co.uk. We will respond within 24 hours. If you do not receive a response, we have not received your photos, please resend.
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 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.
4. DO NOT EXCEED THE MAXIMUM RECOMMENDED COVERAGE OF 5 SQM PER EACH 1L OF PRODUCT.
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.
