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Patio Clean XTREME Powerful Concentrated Cleaner for Black Spot, Algae & Lichen
Product Reviews
By M F

I actually didn't expect this patio cleaner to work quite as well as it did. We inherited the patio with the house and it clearly hadn't been cleaned at all, it was so black we didn't even know what colour the slabs w ere supposed to be. I used the extreme clean first, which made a massive difference, then the black spot remover. Turns out the slabs are a buff colour, and they look brand new. A lot cheaper than installing a new patio, great products well worth a try.

By cj

Have to agree with the other reviews noted. I have used this patio cleaner for the first time and was amazed at how quickly it reacted. I am in the process of re ordering to enable me to complete the rest of the paths and patio area.

By Robert Atkinson

I have to say guys what a great patio cleaner this is, I got to work on this project Saturday morning early and followed the instructions from a YouTube link And the results were great so thanks for all your help. Great service great products I personally would pay just a few pounds more to get the results Thanks again

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Patio Clean XTREME Powerful Concentrated 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

Visa Electron
Product Description

Powerful and Effective Patio Cleaner

Remove black spot from block paving, concrete or natural stone on patios. *Not recommended for use on Tarmac*

PatioClean Xtreme is a fast acting, high performance patio cleaning product, with four powerful active ingredients. PatioClean 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.

PatioClean 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 m of flagstone, natural stone, or block paved patios. Wear appropriate safety wear at all times. see technical page for more information.



  1. Sweep away loose debris & areas with a heavy build-up of dirt & grime.
  2. Wet surface area with water.
  3. Dilute Patio Clean Xtreme at a ratio of 1:1. If removing black spot, don't dilute (use neat).
  4. Apply product to surface using a watering can or sprayer.
  5. Make sure that surface area doesn't dry out before rinsing off.
  6. Leave on surface area for upto 60 minutes.
  7. 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

PatioClean 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 Xtreme can cause skin burns, avoid contact with eyes. Keep out of the reach of children


Product FAQs

Q: Is your extreme clean harmful to plants or wildlife?

Joanne Street

A: If you follow the instructions on the label and our 'how to' guide videos, harming plants and wildlife would be avoided. Hope that helps.

Response from George

Q: I’m looking at buying some of your extreme clean product to clean my driveway which also has quite a lot of black spot around the perimeter the driveway mainly consists of block paving with the edging where the black spot is being made of stone Will the product clean it and remove the black spot. Another potential issue is that the angle of the run off of the driveway leads into a septic tank. Will the product damage the functioning of the septic tank if so do you have any suggestions or alternatives/ advice Thanks in advance

Mr Jon Hutchings

A: If you follow the instructions on the label and our 'how to' guide videos, harming plants, wildlife and the septic tank would be avoided. Hope that helps.

Response from George

Q: We have used your black limestone sealer, which covered well in 2 coats, but got damaged when we used the pressure washer, not realising that you're not meant to. Will resealing cover the damaged, faded areas or have we ruined our sandstone? How should we clean it in future?


A: We we would suggest resealing the damaged areas to create a uniform finish. Then moving forward with an occassional treatment of Xtreme Cleaner or Green Clear to keep the stone looking nice, without the need for aggressive cleaning.

Response from Alex
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