I've never used the stuff before so I'm just trying to work out how to go about it. What I think I know... You can buy it in 20-25 litre drums at 14/15%. You mix that stuff 1:1 lay it down 15-20 minutes but don't let it dry. What I'm wondering is how much coverage can you get with a 25 litre drum? I've read on this forum people are just mixing it in a bucket and pouring it out. I thought a watering can may be more efficient. I've just poured 10 litres of water on my drive to see how much coverage I'd get and it went nowhere. It covered maybe 5m x 3m max. Are people using multiple full drums of this stuff on decent sized areas?