Wet & Forget Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot...

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!

I’ve tried the rest but this really is the best. You definitely get what you pay for most of the time, and in this case it’s certainly true of patio cleaners. Wet and Forget is a product that my daughter swore by when she lived in New Zealand, but it wasn’t then available here in the U.K. I am so pleased that we can now buy it as it’s incredibly good for getting rid of a build up of muck and moss on patios and paths etc. It’s strong and efficient and it removes dirt and grime in a couple of days. Sometimes you may need another application if it’s really grim. I use a watering can, but a spray pump is also great for applying Wet and Forget. Just dilute it down on a 1 part W&F to 5 parts water and away you go. It’s not the cheapest one on the market, but I do honestly believe it’s the best one, as it actually works. It arrived well packed and no leakages en route.

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.

**Scroll down to the very end for my UPDATE. To any reviewers that discredit my review and claim it's not real, sounds too vested in this product. Here's my HONEST original review: Having just used this, I can honestly say it looks worse on our indian limestone. I'm hoping it look better soon. Having done a lot of research before buying this brand, I've learnt a few things: • If you plant to treat lichen I.e. black spots on your stone, do a second treatment in rapid succession after the first. About 20 minutes apart. • The product states to make a mix of 1 parts concentrate to 5 parts water. Make a higher concentrate if you want a more rapid result. **Some reviewers have said it can take atleast six months to notice a difference. • Power washing after using this defies the point of using this product. Not only will you get this toxic substance airborne with a power wash, but, using a powerwash alone, will gain the same result without buying this solution. • I'm going to reapply another treatment tomorrow. There is no way I'm waiting six months for a noticeable difference. You might find you need to order two drums if you want to apply a second treatment right away. This drum makes about 7 applications. i.e. one full watering can (10 litres) equals 1 application. This means 1 part solution to 5 parts water. • You would be able to extend the usage of the solution by using a knapsack, but you will end up getting the solution in places you may not want it, due to the finer mist. Such as a fishpond as in our case or on our ancient dry stone wall which is teeming with beneficial insects which pollinate our fruit and veg. • The substance is toxic to wildlife when wet. Pets should be kept indoors, they say, until it's dry. Yes, it will make a difference to the local fauna in the shorterm, anything that crawled, slithered or scuttled on it, lost it's life. **ALL OF THE ABOVE WAS DEDUCED DIRECTLY FROM THE INSTRUCTIONS ON THE DRUM. IT CAN'T BE DISPUTED!!!** **UPDATE** Just to make it clear, I followed the instructions to a T: Application on a DULL day. No forecasted rain for the prescribed time. This Product takes MONTHS to work. This is my honest review. I gave up seeing an effective difference with this product in the short-term. By short term I mean 3 to 4 weeks. I couldn't see it making a rapid turnaround even if I left it a month or two longer. If you want an immediate difference, to enjoy your garden, for example, in the summer, you may have to resort to more drastic measures. Here's what I did: • I used a bottle of undiluted household bleach to one slab as a "test slab". The bleach cleared the slab by the following morning. • I then applied a 25/75 solution to the rest of the slabs of bleach to water. The result is far better than this solution. The 25/75 mixture didn't give the same results as a 100% bleach. It is however very passable and looks like one year old slabs as opposed to the 'freshly laid' look I was looking for. So to round off, if you are resolved to using this brand's less abrasive solution, plan ahead. Preferably 6 months in advance. If you want an immediate change, try another mixture. The bleach method worked better for me. I really hope you've found this useful. :)

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.

Great product just spray and leave. Did a great job on my drive, killed and cleared all moss and lichen. Would recommend.

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.

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

Once you are able to work out the mixing ratio volume, spray the product in accordance with the instructions and it works very well. Well worth the cost.