I'm absolutely hopeless on these matters but I've got a leak somewhere in my radiator. I'm having to top up the coolant every few days. I bought some Radweld, but to me the directions aren't clear as to the quantity you put in (it's 250ml bottle). I take it I add the whole bottle? I'm also assuming it's ok to use with my 2006 Peugeot HDI? I would really appreciate any help. I know Radweld is only a temporary measure and I be will getting it checked out properly at the end of the month, when I get paid.