– Spear and Jackson - 5L Spray and Leave Ready to Use formula with Long Hose Trigger Spray

I I use it every year

Spray attachment didn't work, had to improvise

Does exactly as its name. Brilliant.

The spray attachment is the wrong size for the bottle, doesn't screw onto it and doesn't work. You need a separate pump, so this isn't great value. The contents should work but will need reapplying. It has a strong bleach smell, and, if that's the main agent, it will need repeated treatments. Probably better for stone and concrete than wood, we'll see. Warning: wear googles, you don't want this in your eyes. Very irritating to the airways, wear a good mask so you don't breathe it in, and rubber gloves are a good idea.

Did the job on stone steps

Cant recommend! High price and barely worked! You can get a packet of foam bleach for around 2-3 pound which done a much better job!

Having read other reviews about the spray not working I didn't bother even trying. As I was cleaning a small patio, I poured it all into a watering can and it was done in under a minute and much easier to pour than spray. I guess it's cleaned it quite well so I would use it again and it was cheaper than getting someone in to clean it !!

As described, very useful.