You need two people! Go get a fein tool with a long blade(or go to hrbor frieght) and cut the seal with it. Get your helper to hold a spackle knife(out side so you dont chip the paint) while you cut it from inside the car.You will also have to work it with a long flexable knife.These old seal leaks and you will see some rust behind the glass! Good Luck! Use caution around the bottom or you will mess up the rear deck