Quote Originally Posted by blackal View Post
Just used up 4 ltrs on my monoblock driveway - it's now about £33 per 4ltrs.

Dilute from 14% by vol to around 10% for use, and make sure if spraying it, that you clean off the pump - as it corrodes metals.

Don't get any on your clothes - it bleaches where it touches.
I bought in bulk at 18 quid for 25 litres at 15% juiced down 4 parts water to one part solution. (Walker Bros, Oldham)
You're right about it bleaching clothing/shoes out, no bother.
I brush it one my drive with a long hair soft sweeper, leave it 20-30 mins then rinse it off with a jet wash, looks like new on completion.