Patio Cleaner XTREME Powerful Cleaner for Black Spot, Algae & Lichen
Powerful Concentrated PATIO CLEANER, Removes, Algae, Dirt & Blackspot. 5 litre treats 40 m² Sandstone, Natural Stone, All Paving Slabs
Powerful and Effective Patio Cleaner
Remove black spot from block paving, concrete or natural stone on patios. *Not recommended for use on Tarmac*
Patio Cleaner Xtreme is a fast acting, high performance patio cleaning product, with four powerful active ingredients. Patio Cleaner Xtreme offers the simple way to keep any patio clean often avoiding the need for pressure washing.
- Simply dilute 1:1 and apply to a wet surface by watering can or sprayer.
- It is important that the patio remains wet for 1 hour.
- Then wash away with water from hose or pressure washer. For areas of heavy soiling, scrub into surface or re-apply.
Patio Cleaner Xtreme is a powerful cleaning product, which cleans & helps to slow down future contamination.
For Removal of
- Black Spot
- Algae and Lichens
- Moss
- Surface Grime
5 litres of product will clean and treat approximately 40 m² of flagstone, natural stone, or block paved patios. Wear appropriate safety wear at all times. see technical page for more information.
Application:
- Sweep away loose debris & areas with a heavy build-up of dirt & grime.
- Wet surface area with water.
- Dilute Patio Cleaner Xtreme at a ratio of 1:1. If removing black spot, don't dilute (use neat).
- Apply product to surface using a watering can or sprayer.
- Make sure that surface area doesn't dry out before rinsing off.
- Leave on surface area for up to 60 minutes.
- Rinse area with water.
It is important the patio remains wet throughout during 60 minute period, as the product becomes inactive once dry. Most ingrained organic matter and grime will be removed after one application, but sometimes a second application may be required to remove all black and white spot algae.
Health & Safety
Patio Cleaner Xtreme contains chlorine as an active ingredient and will stain fabrics and sensitive materials. Take care to avoid contact with fabrics during application. Toxic to aquatic life, wear protective gloves and goggles at all times. Patio Cleaner Xtreme can cause skin burns, avoid contact with eyes. Keep out of the reach of children.
Q: Hello . Can I use this product to safely clean a York stone patio that has darkened over time
A: Yes you can use the Patio Cleaner Xtreme to safely clean a York stone patio that has got very dirty over time.
Q: will this patio cleaner kill the plants
A: Patio Cleaner Xtreme will kill grass and plants if left on without dilution. If the product gets on any green foliage, just rinse down heavily with water and this should prevent any damage to grass or plants.
Q: Hi will patio cleaner xtreme have a negative effect on the surface or colour of black limestone slabs?
A: Hi, no it will not. The negative effect will be caused by storng pressure washing, which you would need to try and refrain from doing. When using the xtreme, you would want to wash it off with a soft hose.
We provide a national delivery service for our block paving sealer, pattern imprinted concrete sealer, roof coatings and tarmac restorer on a standard 2 - 4 working day basis. Dependent on weight, this is normally done by pallet or parcel carrier.
If you need products delivered quicker, for a small additional charge, orders placed before 1.30pm can be delivered within 1 - 2 working days to most parts of the UK, although this is dependent on the courier service in your area and the product/s ordered. If you require this service, please check on area availability by calling 01268 722500.
Our commitment is to supply all orders as placed and we offer a comprehensive guarantee of quality. Providing a reliable delivery service to all our customers is most important to us and this is backed up by the many satisfied customer testimonials we have received over the years.
If you need an order delivered to a different address, left somewhere at your property without a signature or left with a neighbour, just let us know.
We also try to maintain 100% stocking levels of our products at all times, so an immediate despatch is virtually guaranteed.
Our product returns policy can be viewed by visiting our Terms and Conditions section.
*Free delivery on orders over £75 are subject to the delivery address location.









Great worked like a charm on almost most of the patio, had use it neat on more stubborn patch. But it all came up brilliantly.
Power washing paved patios doesn't get to the root of the grime but do a preliminary power wash then apply a 1 : 1 diluted Smartseal Xtreme patio cleaner and leave for 1 - 2 hours then rinse off with water and you will need sun glasses to use the patio area. Cannot fault the product and always recommend it to all my friends.
I hadn't cleaned a patio before and I chose this Smartseal product because of the thoroughly professional impression of the company that I formed from my initial contacts with them. That is, their Help line and their "How to" videos in particular. Despite that I was still genuinely surprised at how good the product was, how easy to use and visibly effective. I completely agree with the many positive reviews by other users.