A method of using a floating seal assembly comprising: placing the seal assembly in a bore of a first structure having a surface defining the bore so that the seal assembly seals against the surface of the bore, wherein the seal assembly comprises: a seal element comprising a first sealing flange, a second sealing flange, and a center channel section, which together define a seal cavity; said first sealing flange comprising an outer exterior surface and an outer interior surface, and said second sealing flange comprising an inner interior surface and an inner exterior surface defining an inside bore; a support band comprising a body located within the seal cavity and having a projection mechanically engaging a step of the seal element, said body of the support band comprising a groove having a bottom surface, a contoured surface, and a radial lip that reduces an opening to the seal cavity, wherein the support band is recessed radially of the seal element; a first loading spring located in the seal cavity and biasing against the contoured surface and against the inner interior surface of the second sealing flange; a second loading spring located in the groove of the support band and biasing against the bottom surface and against the outer interior surface of the first sealing flange; placing a second structure inside the inside bore of the second sealing flange; and wherein a loading force applied by the first loading spring on the second sealing flange is less than a loading force applied by the second loading spring on the first sealing flange. placing the seal assembly in a bore of a first structure having a surface defining the bore so that the seal assembly seals against the surface of the bore, wherein the seal assembly comprises: a seal element comprising a first sealing flange, a second sealing flange, and a center channel section, which together define a seal cavity; said first sealing flange comprising an outer exterior surface and an outer interior surface, and said second sealing flange comprising an inner interior surface and an inner exterior surface defining an inside bore; a support band comprising a body located within the seal cavity and having a projection mechanically engaging a step of the seal element, said body of the support band comprising a groove having a bottom surface, a contoured surface, and a radial lip that reduces an opening to the seal cavity, wherein the support band is recessed radially of the seal element; a first loading spring located in the seal cavity and biasing against the contoured surface and against the inner interior surface of the second sealing flange; a second loading spring located in the groove of the support band and biasing against the bottom surface and against the outer interior surface of the first sealing flange; a seal element comprising a first sealing flange, a second sealing flange, and a center channel section, which together define a seal cavity; said first sealing flange comprising an outer exterior surface and an outer interior surface, and said second sealing flange comprising an inner interior surface and an inner exterior surface defining an inside bore; a support band comprising a body located within the seal cavity and having a projection mechanically engaging a step of the seal element, said body of the support band comprising a groove having a bottom surface, a contoured surface, and a radial lip that reduces an opening to the seal cavity, wherein the support band is recessed radially of the seal element; a first loading spring located in the seal cavity and biasing against the contoured surface and against the inner interior surface of the second sealing flange; a second loading spring located in the groove of the support band and biasing against the bottom surface and against the outer interior surface of the first sealing flange; placing a second structure inside the inside bore of the second sealing flange; and wherein a loading force applied by the first loading spring on the second sealing flange is less than a loading force applied by the second loading spring on the first sealing flange.