The gasket between the header and the block is leaking when the engine is cold. I dont want it to leak at all. Would this stuff work, local muffler guy said it would. IF not where can i get a non metal gasket? Thanks
It might work if you spray it on the two mating surfaces. It will not work if you just spray it on the leak. My advice - take the header off, get a new metal gasket, spray some of that copper gasket cement on, and that should solve your problem.