Free Delivery

Patio Clean Xtreme - 5 Litre - **BUY 1 GET 1 LESS THAN HALF PRICE!**Please Note: By selecting "Quantity of 1" of this offer, you will receive 2 x 5 Litre of Patio Clean Xtreme**

inc VAT
StarStarStarStarStar 24 Reviews|(5/5)
In Stock In Stock
Patio Clean Xtreme - 5 Litre - **BUY 1 GET 1 LESS THAN HALF PRICE!**Please Note: By selecting "Quantity of 1" of this offer, you will receive 2 x 5 Litre of Patio Clean Xtreme**
Quick Tips & Advice

Customer Reviews

Purchased this cleaner last spring for the first time to get rid of black spot on patio, best product Ive found for this job as it brought it up like new. Just purchased two more tins during Black Friday offer as the price was excellent and weve had some work done in garden this autumn so patio needs doing again next spring. Excellent product can definitely recommend

By Robert Toole

Worked very well on my imprinted concrete and left a well prepared surface for the sealant. Follow the excellent video and written instructions from the Smart Sesl website, and you cannot go wrong.

By Kieran Murphy

Easy to apply and good cleaning using the Xtreme. Not all white /black spot removed despite scrubbing. Maybe I should have used a power washer? Great improvement.

By Maralyn Yorke From Bristol

Last year a guy came with lots of wonderful equipment, he was here all day and charged a fortune to clean my patio. The result was not too impressive. Yesterday I tried your product. I sprayed a small area and simply washed it away two hours later, the result was outstanding. I can't believe how simple it was to get a great looking patio. FREE OF BLACK SPOT. I am so thrilled.

By Alan Tromans

Used to clean an Indian Sandstone patio, removed all the blackspot and grime, looked 10 times better, even before further treatment. Will certainly use again, really good service.

By Steve Raynor From Worksop

Used product on block paving with quite a lot of white lichen. One to one dilution had a little effect but used neat with a bit it scrubbing was effective.

By Anthony Baxter From Canterbury

Cleaned the pathway using the Patio Xtreme product Came up as new! Customer pleased

By Richard Moore From Guernsey

really good product worked very well on patio, delivered on time would use again

By Jeffery Mills From Birmingham

Came across the smart seal you tube video when looking at pressure washing my limestone patio. Bought this instead. Very easy to use and the result is fantastic . Thank you

By Harriet Walsh

We have a white sandstone patio which really shows the dirt, mould, algae etc. I have tried jetwashing this patio a few times which shows reasonable results but only shortlived. I then heard of 'soft-washing' with chemicals which carry on working after they have done the initial clean. I found Smartseal on the internet after doing pretty intensive research. The difference Smartseal has made is amazing! The change is not instant as it is with jetwashing, but it is much better in the end. I found that I could notice a difference after an hour but it kept getting cleaner for a few days and the overall result was really impressive. My patio was particularly bad and there are parts that will need a second application, as in the instructions, but this is only to be expected. Smartseal is one of the most expensive of the chemical mould and algae cleaners, but you only get what you pay for, and as far as I am concerned, it is worth the few pounds extra. One thing I was worried about was the effect that the Smartseal may have on my lawn which butts up to the patio. It has been about ten days now since I used it and my grass has hardly yellowed, and only at the very edge, so I am very pleased with the little damage it may have done. Overall I would definitely recommend Smartseal for an easy to use and very effective cleaner.

By Clive Tucker From Whitstable

My Indian stone patio was looking very shabby having being neglected for several years, it was unrecognisable from when it was originally laid with most of the slabs discoloured to a grey / black patina, they were also covered in black spot and lichens. The last time I tried to smarten it up I used a jet washer which was time consuming and not particularly effective, it also damaged the pointing. I was considering having the whole patio re-laid with new stone but as a last resort I decided to try Smart Seals Xtreme patio cleaner, it turned out to be a very good decision. I was initially sceptical of the product, I thought the Indian stone was too far gone to be restored, but after spraying the whole area with a slightly more concentrated solution than recommended, I left it to soak for an hour and returned to find the stones had started to show some of their original colour. With the stones still wet I used a stiff broom to scrub the solution into the stones and the results were remarkable, after washing off with clean water all the colour had returned and the lichens / black spot had disappeared, it looks as good as new. I will now apply a sealant to help preserve the stone work.

By Philip Steel

Absolutely amazing product! I had arranged to have all the paving slabs on my patio replaced as jet washing no longer made much difference. I came across Smartseal online and decided to try the patio cleaner first. I couldn�t believe how brilliant it is! Suffice it to say I�m no longer replacing the slabs. They literally look like new

By Lynda Mitchell From Warwickshire

The patio cleaner does what it says and easy to use.

By Christine Walmsley From Blackpool

The patio cleaner has worked really well.

By Moloya Mukherjee

I bought this to remove the "black marks" on my block paving patio which I clean each year with a patio cleaner and a pressure washer patio cleaning attachment. I used the original cleaner first, then sprayed on this product (1:1) used a stiff brush to scrub he area (nit Ann easy job!), left for 2-3 hrs. In the intervening period I applied some 100% concentration product to the worst areas, then washed the whole area using the pressure washer patio cleaning device and rinesed with hose. Result is definitely an improvement but the black markets are not eradicated and I'm looking at doing the same next year.

By Stephen Davies

Very effective easy to apply patio cleaner and really good results

By Patricia Cox

I am disappointed. My driveway has improved a bit, but I cant justify another 2 double containers to do it again undiluted. I cannot recommend it. Andrew Chalmers

By Andrew Chalmers

Tried this out on dirty pavings and patio and am very pleased with the results, it is nice to have some colour back. It is straightforward to use and does what you say - recommended.

By John Lee From Herefordshire

Applied extreme clean to my block paving. Very pleased with results.

By Kenneth Knowles

Brilliant. Did a perfect job on my patio. Much better and quicker than my power washer.

By Mel Lloyd

Smart seal for block paving super product does the job try it you won't be disappointed staff are great and helpful

By Alun Jones From alunjones124@gmail.com

I followed the instructions to the letter and was very disappointed at the results even after two applications,simple hosing made no difference and had to jet wash my entire drive . Fair enough my block paving is twenty plus years old but I expected better. SMARTSEAL REPLY- We spoke to our customer, agreed, on very old or surfaces in poor condition, jet washing at a low level plus, using the product might be required to acheive the desired result.

By Gary Guest From South yorks

Used Xtreme Cleaner plus sealant on my Indian Sandstone patio that is very porous and a nightmare to keep clean . 1 year since being cleaned and still looks good. Certainly recommend products.

By Nick Carter From Stowmarket

the best patio cleaner I have used. Very effective at removing black algae scum and leaving a brighter surface. May need a second go on difficult out of sun areas, but worth doing. I used at 1:7.5 strength initially and 1:10 for second. Must be kept damp, do not let go dry for a couple of hours until you wash it off with low volume pressure sprayer

By donald johnston From sussex
Read more reviews

Leave A Review

Product Rating  *  *  *  *  *

*All submissions will be checked by our administration team before appearing on the site. Please be patient as we will try and approve your comments as quickly as possible.

Ask Us A Question


**Please Note: By selecting this offer, you will receive 2 x 5 Litre of Patio Clean Xtreme**

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 combines with a biocide 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.



Sweep away loose debris and areas with heavy build up of moss. Firstly wet the surface of the patio with water. Dilute PatioClean Xtreme at a ratio of 1:1. Then apply liberally using a watering can or sprayer, leave on the surface for approx 60 minutes or longer before cleaning off.

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