It costs £30 for 5 litres,this makes about 30 litres,I aim for getting £75 for putting a 5 litre bottle down which takes 15 minutes,this means you make £45 on top of your cleaning and sanding,it makes the job so easier ,no sand coming up if it rains and none getting walked into custys house,they love it,can`t wait to see how long it lasts though. Anyone used it long term?