HG Algae & Mould Remover | Concentrated Patio & Path Cleaner | Stone-Safe Biocide for Paving Slabs & Outdoor Areas | 1L

This does amazingly when removing moss and algae from outdoor tiles. I then use HG patio cleaner to give it a further clean. I’m now on my 3 year using the same bottle and works just like new.

Reading the other reviews you wouldn't think this would work well however i used it on my stone flags with good results. Definitely cleaner and has killed the algae . First i treated with ratio as described so 1:20, then i think i used 1:10 for flags with excessive algae. I know i'll have to retreat in 6 months or so but will do nicely for now. also used on a fence but probs needs another spray as it hasnt all cleared..

Decent product, our patio gets so slippery with algae and surface dirt it's a real hazard. This product makes the surface safe again. I wouldn't say it's the best cleaner as the patio still looks a bit stained, but I will find something else for that. Priority was to get rid of the slipperiness.

Arrived fast and as described.

I think it works well 👌 I watered the full patio with water (using karcher) before use. Than i mix it with water as was describedribed. Brush it into my paving and leave it overnight. The next day I splash it out with karcher. I doubt it would work so well if i wouldnt have a powerful tool..

I applied the algae remover diluted to manufacturers suggestion via my watering can sprinkler. It was quite dark green in parts. After 2-3 days it was lighter but still green. So I repeated the process. Have to be sure get 3 dry days in a row. Again better but definitely not gone. Am on 3rd application to date. Also tried it on front path which was lightly affected by moss & algae. Made no difference. Used whole bottle. Will buy something else in the hope it works better. Maybe this stuff is for light areas of algae? Didn’t work for me.

Very good works well

I wasn't too convinced that this would be any good but I have to say it is VERY good! I purchased it to remove green algae from a brick wall in my front garden, and didn't want to risk damaging the mortar with a jet wash. I made up half a bucket (diluted) of the solution as indicated on the bottle (dosage) and using a small wire brush scrubbed the affected areas. The green algae was lifting off the brickwork as it was agitated. Looks much better and didn't use too much of the solution so will be able to use again after another winter. Pleased with outcome and would recommend.