no break peddle at all

I have 2004 ford sport track and there no break peddle pressure goes right to floor,master is full of fluid no visibe leaks i can see any where! Cap for master has blown rubber gasket out of itself! Is this a bad master or something else?

If you are saying that the gasket for the master cylinder cap is blown out, then that is a sure sign of contaminated brake fluid. Someone put the wrong fluid in it !

So now all the rubber components in the brake system have failed- master cylinder, hoses, calipers, rear wheel cylinders, etc. All these would have to be replaced, the rest of the system needs to be flushed, add new fluid and bleed system.
See this link for more info...
http://www.cartruckinfo.com/brake-fluid ... ation.html