I bought 20litres to do my driveway of 32 msq . The tarmac was in good condition just faded . The product was really easy to use . I did buy an additional 10 litres as I didn’t want to run out .I had about 7 litres left over after giving it 3 coats . The driveway now looks brand new . Excellent product . Can’t wait to see how it holds up to the weather . All I would say it does splash very easily as it has the consistency of water . So be careful and fully sheet up adjacent surfaces .