Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L

I’ll be honest, I went into this a bit sceptical. Outdoor cleaners usually promise a lot and then quietly disappoint, so I deliberately waited quite a while before writing this to see what actually happened over time. The difference is obvious. The before and after is night and day. Black mould, algae and general grime that had been clinging on for ages has genuinely cleared away without any scrubbing. It looks cleaner, brighter and just healthier overall, especially on areas that never fully dried out before. In terms of use, the first application I did with a jet wash because it felt quicker and easier for covering a larger area. That worked perfectly and made light work of the initial clean. Since then I have reapplied it every few months using a standard pump sprayer and that has been just as straightforward. Ease of use is a big plus here, fill it, apply it, walk away. No effort, no fuss. The functionality is exactly what it claims. You apply it and let it do its thing over time. There is no instant blast like bleach, but that is kind of the point. It keeps working long after you have finished applying it. Durability is excellent because the results last, not just a quick cosmetic clean that comes back after the next bit of rain. Quality feels spot on and the capacity goes a long way, especially when diluted properly. Power wise it is clearly strong enough to deal with stubborn growth without damaging surfaces. Value for money is very good considering how effective it is and how little effort is involved. One bottle has covered far more area than I expected. I honestly cannot fault it. No weird residue, no strong lingering smell, no damage to surrounding areas. It just quietly works. That whole too good to be true saying does not really apply here. This one actually delivers.

Small amount for the price but dilutes down so not bad value. Does not smell chemical and the bottle was well packaged on arrival, easy to apply with a spray bottle and no leaks. Seemingly takes a while for removal but our green algae on the wooden fence slats went almost instantly. It looks really good now. Was worried about the effect on nearby grass but this seems less damaging than other chemicals we have used in the past. The slats now look much better. Really effective and hopefully long lasting. This should avoid us having paint the fence this year. I did most of our fence and also a decent amount of decking boards, spindles and siding with the smaller bottle. A big bottle would easily do a whole garden.

So easy to use & with such minimal effort the algae on my fence has gone! Over the years I have used so many different products all promising the same thing, & none delivering so was sceptical about this even though the reviews were generally good. It was good on my patio, but it was amazing on my fence! Used a spray pump canister & just one layer of spray on the fence panels has removed all the algae. Amazed! Highly recommend!

Sprayed solution, diluted as instructed on fence panels that looked like a lovely green carpet. Left for a week to totally do its thing. Could see it working after 24 hours, fence went white. Highly impressed . Did it on patio slabs, killed the moss but black mould still looks the same. Had a good few downpours but doesnt look any different. Think its back to a jetwasher and soapy solution, maybe some elbow grease too.

Brilliant stuff so easy to use, you do literally 'wet and forget'. In a couple of days the slabs are clean. No more pressure hosing. Love it

Worked great on the green areas but failed miserably on the lichen

Got fed up with power washing the patio every year and then having to replace the cement between many of the slabs. So looked for an alternative and for several years I've used Wet & Forget. It's easy to use and doesn't damage the patio. Sometimes it takes a couple of applications but it is very effective.

This is brilliant stuff, great for removing black mould on garden timber etc. Good price to compared with some other brands

This product is the best on the market and worth the cost. My fences have looked great for years with a treatment every 5 to 7 years or so. Plus unlike high pressure cleaning, it doesn't remove the pine wood treatment meaning it is clean but not exposed to termite damage.

Trying different concreat mold remover over the years .this is the best one i.ve got so far.

This was sprayed onto a heavy lichen infestation and had started working by the next day with some lichen falling off. Very happy with these results

Great for mould and algae removal and easy to use.

Great product and good value with Prime