all i wanted to do is put something in the front of my car and all i seen was brake fluid all over the place. to people who do not know how to put a cap back on, donot touch cars for a living. the gasket was sucked in the with the two round thinks stuck in the valleys where there should be fluid. i would think when checking the fluid you can see thru the side being it is see thru plastic. i you do remove the top and the seal does not come with it, when installing it the seal should be in the top and everything should be flush. Or would steping in the brake pedal suck the seal in the master.? i am not sure but the front compartment is very clean now.