Spear & Jackson - Spray and Leave Concentrated Mould, Algae and Lichen Remover - 5 Litre

This stuff is great for removing green on patio. Easy to use

Kills and cleans algae on fences and concrete without the need for scrubbing, leaves no trace of residue, I sprayed in a dry spell after a couple of days no trace of green, but it will return over time, worth it to prevent slipping on concrete paths etc. Will treat again end of autumn and hopefully keep algae down to a minimum in winter months.

This stuff is really fantastic we use it to clean our paving slabs every year it’s just great

Thus worked well

I have only done a test patch but this stuff definitely works. However, the reason for 4* is it's a very 'toxic' substance when wet and the cat didn't take too kindly to being locked inside for the time it took to dry. I was also concerned about my resident hedgehog but luckily it was fully dried before the evening. Be aware this stuff is very toxic to aquatic life, other animals when wet, and plants. I will finish the patio but probably won't use it elsewhere in the garden.

I have used this product for several years . It’s very good for my front drive and side walk and up under the wisteria for paving . Easy to apply with pressure washer . And the results are quite rapid. . I don’t use it round the garden only drives and patios.

The product is good but the delivery just left in the porch of a house round the corner typical of Hermes

I bought this Spear & Jackson Spray and Leave remover to deal with algae buildup around the house, mainly near the hose and water pipe, as well as on the tarmac drive. Application was straightforward, and it did a good job without needing scrubbing or pressure washing. After leaving it to work, the algae cleared up noticeably and the affected areas looked much cleaner. Nothing fancy here, but it does what it’s meant to do. Useful if you want a low-effort way to deal with algae on outdoor surfaces.