No it doesn't seem to be.is there supposed to be a gasket between the MC and the booster?...hard to explain but I'll try.....on the power booster, where it is joined together...you know, like the 2 halfs are joined, it is seeping down at the bottom. Doesn't "leak" out, just kind of gets wet or seeps there. I hope that makes sense. I believe it is a dual diaphragm booster.is the master leaking from the rear seal?