Your patio didn't always look like this.
It used to be the place you'd sit on a summer evening with a glass of something cold. Now it's green, slippery, and vaguely embarrassing. The fence has gone black. The decking looks like it belongs in a swamp.
You've tried pressure washing. It looked great for about six weeks. Then the moss came back — because pressure washing doesn't kill it. It just gives it a haircut.
What if you could spray it once and walk away?
Three Steps. No Sweat.
Mix it. Spray it. Forget about it.
Mix
Dilute the concentrate with water. One bottle makes enough to treat 100m² — that's a large patio and a driveway.
Spray
Spray onto the affected surface until thoroughly wet. That's it. No scrubbing, no rinsing, no follow-up treatment.
Walk Away
The formula kills moss, mould, and algae at the root. Results visible within days. Keeps working for months.
See It In Action
Patios & Block Paving
Kills moss in joints and across slabs without damaging the stone. No more slippery surfaces or green-stained grout.
Driveways & Paths
Concrete, tarmac, gravel — clears the green film and stops it coming back. Works on any hard surface underfoot.
Decking & Timber
Safe on treated and untreated wood. No sanding needed afterwards. Just spray and let the formula do the work.
Fences & Garden Walls
Black mould gone. Green algae gone. Timber and brick both safe. Your boundaries looking sharp again.
Roof Tiles
Spray from a ladder or use a hose-end attachment. The formula does the climbing for you. No pressure washing your roof.
Artificial Grass
Kills algae build-up without damaging synthetic fibres or infill. Your fake lawn looking real again.
The Pressure Washing Problem
Hiring someone to pressure wash your patio costs £200+ per visit. Buying your own machine costs £150+, plus storage and maintenance. And either way, the moss comes back in weeks — because pressure washing only removes the surface growth. The roots stay in the pores of the stone.
Worse: high-pressure water damages pointing, strips sealant, and forces spores deeper into porous surfaces. You're literally spreading the problem.
This isn't a cleaning product. It's a killing product. From £34.67
27 Clean Patios and Counting
4.6 out of 5 stars. No scrubbing was harmed in the making of these reviews.
For outdoor hard surfaces only.
Don't use this on your lawn — it will kill grass. This is designed for patios, paths, driveways, decking, fences, roofs, and artificial grass. For lawn moss, see our Winter Lawn Treatment.
Safe for your family.
Once dry (typically 2-4 hours), the treated area is safe for pets and children. The formula biodegrades naturally — no harsh residue left behind.
Quick Answers
"Do I need a pressure washer?"
No. That's the whole point. Spray this on and the moss dies. No machine, no scrubbing brush, no effort.
"Do I need a sprayer?"
Yes — a pump sprayer makes application easy. We sell a 5L Pump Sprayer for £21.99 if you don't already have one.
"How quickly will I see results?"
Moss and algae start dying within days. Full clearance typically takes 1-3 weeks depending on severity. The longer you leave it, the cleaner it gets.
"Does it work in winter?"
Yes. It works year-round, though results are fastest in spring and summer when growth is active. Winter application still kills — it just takes a little longer.
"Will it stain my patio?"
No. Safe on all hard surfaces including natural stone, concrete, block paving, tarmac, and timber.
"What if it doesn't work?"
60-day guarantee. Clean surfaces or your money back.
Clean Surfaces or Your Money Back
Spray it on. Give it time to work. If your surfaces aren't visibly cleaner within 30 days, get in touch and we'll make it right — or give you a full refund. No scrubbing required for that, either.
While You're Out There
Everything you need to take back your outdoor spaces.
Learn More
The green slime isn't going to remove itself.
One bottle. 100m² of coverage. Moss, mould, and algae — dead. From just £34.67.
Choose Your SizeREVIEWS
| 5 star | 74% | |
| 4 star | 19% | |
| 3 star | 7% | |
| 2 star | 0% | |
| 1 star | 0% |
Good stuff, does what it says
Not used this batch yet but always good - pls stop raining!
Fantastic product. It's small but makes a lot! Very impressed with the results and how little I needed. One happy customer
What did you use it for?
Patio slabs
Was it successful?
Yep! We have a large slabs area, no scrubbing just spray for patio and leave.
What did you use it for?
Slippy patio mold
Was it successful?
I put this down this week, and already the mold and slippery ness of my patio has gone! The moss is dying between the cracks of the patio too. And BONUS, I poured it on my white gravel that has started going yellow with dog Urine and it has whitened the stones! A real answer to my problems. Has also removed dog urine odor. I have bought another to do my front driveway too! Wonderful product well worth the money.
What did you use it for?
Clean the green off around the garden (walls, path, fences, gates etc)
Was it successful?
This stuff soo good couldn't believe just overnight change my green back garden to normal! Will defo purchase again
What did you use it for?
My flat roof had a thick coat of moss. I started with a rake but while the moss is alive and green, it retains lots of water, which makes it sticky and very heavy. This product kills and dries the moss, making clean up so much easier!
Was it successful?
Easy to use and good results.
What did you use it for?
Fence and shed
Was it successful?
Extremely
What did you use it for?
Algae remover
Was it successful?
Does the job. Cleans the patio , fence and roof. Depending on the severity of the infection, may need further treatment
What did you use it for?
Driveway, paths and small wooden deck
Was it successful?
No issue with the product, however application instructions say use a sprayer but none was supplied
What did you use it for?
Built up moss and dirt on an old brick wall
Was it successful?
Yes, took a few days to get going but looking like new
What did you use it for?
Pavement and drive
Was it successful?
Great product, kill's algae, moss and protects my fence, excellent on pavements and driveways, just spray or paint on and leave, how simple but wish they did bigger bottles.
What did you use it for?
Get rid of moss
Was it successful?
Easy to use .i sprayed it on the driveway and walls in garden . Moss turned yellow after 12 hours and moss was gone after 10 days
What did you use it for?
Clean moss from gravel drive and stairs
Was it successful?
Nothing to dislike, did an excellent job as quoted
What did you use it for?
Patio, roofs and brickwork for moss and algae.
Was it successful?
Bought several times now! And actually works! Previously I’d jet wash all the algae/mould/lichen off the patio & brickwork but it would quickly return as although I’d removed the surface “dirt” the spores? We’re still present & would just regrow! This kills them off & with repeated use ensures my patio stays clean. Also used it on the garage roof and over time brought all the moss off. Don’t expect a miracle cure it does take time, dilute, spray & wait!
What did you use it for?
Moss
Was it successful?
Really does work
What did you use it for?
Driveway
Was it successful?
Nice and clear, simple
What did you use it for?
Fence posts and decking.
Was it successful?
Yes! All the green crap has disappeared and looks almost new.
What did you use it for?
Cleaning the green sludge off my patio and deck
Was it successful?
Small bottle but it doesn't take much. Product worked well only 4 stars because there was an issue with delivery
What did you use it for?
Used in a sprayer on moss and algae on patio and old brick wall.
Was it successful?
Seen improvement after couple of days, have to repeat as see which bits ive missed but worked really well wish i had taken before and after photos now.
What did you use it for?
Moss on stairs and in paver gaps
Was it successful?
Does da job
What did you use it for?
Patio cleaning.
Was it successful?
Does what it says on the tin. My sandstone patio is effortlessly always clean. Will buy again.
What did you use it for?
Used on coloured render that doesn’t get much sun and had started to look very tired and dirty after about six years.
Was it successful?
Applied product but did make mix a bit stronger than standard dilution. Worked well, didn't expect such quick results.
What did you use it for?
I use it on my wooden garden fence, I was very surprised , how fast it worked.
Was it successful?
This is an extremely good product. Easy to apply. All green algae has completely gone. Will definitely buy again. Highly recommend.
What did you use it for?
To kill moss and green slippy stuff on my driveway in mid October.
Was it successful?
I was pleasantly surprised to see almost all the green stuff had started to disappear within a few hours. The moss which has been there for a few years took a few days but it turned brown then yellow then just kind of melted away.
Very happy with the results but unsure how long it will last, it's better than the other product I used
What did you use it for?
Awning mould and mildew, mainly to clean.
Was it successful?
I’ve tried various cleaners that say they treat mildew and green mould from awnings and sunshades, nothing has worked, this stuff however you can see it working, our large cream canvas garden umbrella stays out all year long, during the winter months when it’s stormy we fold it down it had become an eyesore with green lichen type mould, I applied this twice over a week with a garden sprayer when we had good weather, it changes from green to black then fades away gradually,
What did you use it for?
Easy to use and did the job.
Was it successful?
I had loads of miss on my roof tiles and this killed it.
Key Specs
Everything you need to know.
FAQ
We aim to deliver all orders within 1-4 working days. If you place your order before 1 pm, we often ship the same day. Delivery times may be extended slightly during major holidays (e.g., Christmas/Bank Holidays).
All orders qualify for free UK delivery. The price you see is the price you pay—no hidden fees.
We are confident you will see great results. If you are not satisfied with the product's performance after following the instructions, please contact us within 60 days, and we will work to find a solution.
No! A garden sprayer is all you need. You can purchase one with your order in the cart or checkout. Do not use this product with high pressure sprayers!
Simply douse the moss / algae with the diluted solution and leave it to do it's work. No scrubbing or scraping ever.
Yes, but please exercise caution. To ensure safety, exclude pets and children from the treated area until the solution has dried (usually a few hours).
Each bottle will cover roughly 100m2 and dilute 10 litres - this is enough to fill a 5L sprayer twice and will cover a 10mx10m area.
You should start seeing visible results within hours or a day. The moss will turn yellow and melt away, algae and green sludge will simply melt away.
No, it is safe to use on all outdoor surfaces. Do not use this product indoors! If in doubt try it on a small area and leave for a day or two.
Yes, absolutely! This is designed as a year round treatment. Please do not use when it's frosty or snow is on ground.
The product not only melts away moss and algae it provides long lasting protection. 1-2 treatments per year should suffice.
No, as long as stored in a cool / dry place the product should last 5 + years