Hello screwdriver !!!! Discusion from January ….About Bars Leaks Cooler and sealant !! Wonder me about so many negitive experiences with Bars Leaks Cooler Density .I have to say however that I have made very good experiences about this product.Selber binn in the motoen repair work and work are years with this product and indeed with success.For coolers and head seals have repaired a lot of vehicles permanently with this product and it can only recommend it Especially for older vehicles for which a cylinder head gasket is no longer considered for cost reasons, but also others.Of course, a new head gasket is always better, but I find it a good alternative.Many make application errors in this project over and over again, which could be constipated by eventuel, or that the leak is not eliminated.But in the correct application it actually always works to almost 98 % . Share me times your experiences with !!! Greet your Dieseldocktor !!!