Block paving cleaner

[TheBinarySheep]

I need to get around to cleaning our drive. It's those grey permeable blocks that new builds have these days.

Some areas are showing a hint of green, and we've got some grass etc growing through some of the block.

Can anyone recommend a cleaner that I can use with a jet wash to spray on, leave and simple rinse off. Something that'll get rid of the green and also kill anything growing between the blocks?

At our old house I used to use sodium chloride, brilliant stuff, but our drive joins onto our neighbours drive and I don't really want to use something that strong near someone else's drive. Nor do I want to kill the grass next to the drive.

[TheBinarySheep]

TikTak said:

We use sodium hypochlorite, 1 part to about 6 water and we have a grass verge (rinse off in the opposite direction) and it's fine

Doesn't put their cats off from stting in the bush either so seems gentle enough.

That's good know, I might just do that then.

I've tried a number of products in the past, but they never seem to work as well as sodium hypochorite.