GLEAN Green Clean Patio Cleaner 5L | Covers 200m² | Concentrate | Algae Remover for Moss, Mould, Lichen & Algae | Spray and Leave | For Paths, Fences, Roof Tiles, Decking, Brick & Concrete Surfaces

This product is truly superb.I was concerned that the product my also remove the Cuprinol treatment on my fences.I cleaned a whole section yesterday post to post and top to bottom as a test piece.Went back today 1 day later and am amazed at the results.Pristine all over and no damage to the Cuprinol.I can now confidentially spray all contaminated areas.Brilliant stuff.A delighted customer...👌🏼

This worked best on concrete slabs. But wherever you apply it, don't expect instant results. In a day or two, or longer, you'll be pleasantly surprised. I was so pleased with this stuff, I ordered another bottle. I am quite nervy about handling potentially hazardous substances and this ready-to-use formula is a boon. Full marks that the spray mechanism kept working smoothly right to the end as well.

This stuff is fantastic. We decided to go for this product as it’s safe for pets, doesn’t damage grass or plants and better for the environment (I have a lot of wild bird feeders in our gardens and have dogs so this was a must) I didn’t like the idea of pressure washing everything because of how much we’ve been hammered with the constant rain and damp for months so didn’t want to water log our yards or gardens. We have a west facing home with very large overgrown council land trees and a hill at the south side of our house so are in full shade for a lot of winter and a good chunk of the summer. Algae, moss, mold you name it our property has it and the green moss was especially bad on the fences as well. Bought the 5 ltr concentrated tub and used it on our greenhouse, fences all the way around the property, walls, bricks you name it. I probably used a higher concentration than recommended, more like 3 parts product to 5 parts water only because when I added the water there was a lot of bubbles in the pressure pump I was using and kept overflowing when trying to add more water, my inexperience. Next time I’ll add the water first then the product. I’d highly recommend getting a garden pressure pump, they are cheap as chips and make application a breeze if you’re doing very large areas. Applied in dry sunny weather yesterday between 2-3:30pm and no rain forecast the following day. I wasn’t expecting to see a difference so quickly but it’s literally cleared 95% of the algae and moss overnight! I’m not joking literally overnight! I’ll be buying more of this and spraying on the back patio as well. Will save me hours and hours of scrubbing or a very messy jet wash job. This will also prove useful for our very large tarmac drive as pressure washing would cause too much damage in some areas as it’s been down a fair few years before we recently bought the house. Don’t be shy with application, you have to completely soak whatever you’re spraying. I should have taken more before photos, the photos I’ve uploaded are not even 24 hours difference! Don’t hesitate to buy this it’s brilliant.

Worked well on removing algae on fence before painting. I found it less effective on moss on patio. After several days moss is still proving difficult to remove despite scrubbing with brush. Also, don't expect this spray to do wide areas, it simply won't. Expensive for what you get in my view.

Only having a small outside area which had the back area covered with fencing did not want to spend a lot of money on a large amount of product. During the winter the fencing had become black. It has only been just over a week since the area was sprayed and all ready there are signs it is working with the black on the fence appearing reduced. So easy to use just highly recommend this product. May need to do this yearly however, as it is so easy to use and not that expensive and it seems to have worked using yearly will not be an issue.

Does everything it says. My metal gates were covered in geez algae. Now clean, beautiful black metal.

This was one of the more expensive moss/algae removers and the expectation was that this would mean a more effective product. Unfortunately in my experience this has not been the case.Despite following the dilution instructions (it was actually more concentrated than 1:5) and using copious amounts of the product in two treatments on separate days this item has utterly failed in it's purpose.I was using it in an attempt to remove moss from my drive, after a few days the moss turned a rust colour but otherwise there has been no effect. The moss still refuses to be removed even with vigorous scrubbing despite weeks having passed since the treatment.Now I'm left with a drive covered in even more unsightly rust coloured moss, as can be seen in the pictures. I'm extremely disappointed and feel like I wasted my money.If I could I'd ask for a refund, but I don't think Amazon would accept a return with only a quarter of the bottle remaining. 😐

This works better than I expected to be honest. So much so I’ve ordered another bottle. Not cheap though.