NOVELTY - The method involves applying resiliently compressible curable composition of predetermined thickness on the fuel cell components such as bipolar plate, mono-polar plate and membrane electrode assembly (MEA) (12). The fuel cell components are abuttingly engaged by applying a compressive force. The composition is cured during application of compressive force to the fuel cell components.    USE - For manufacturing proton exchange membrane fuel cell.    ADVANTAGE - Improves sealing by adopting both adhesion and compression to provide sealing. Enables connecting fuel cells in series or parallel and hence increases overall power output of the fuel cell assembly.    DETAILED DESCRIPTION - The method involves using curable composition that is compressible up to 35% of its thickness, for coupling the fuel cell components. The composition is a low-ionic silicone composition and does not react with metals of group 8 of periodic table, such as platinum.    INDEPENDENT CLAIMS are also included for the following:fuel cell assembly comprising a compressible gasket that is adhesively boned to mating surfaces of adjacent fuel cell components such as membrane electrode assembly of proton exchange membrane fuel cell. The curable composition comprises a platinum-based addition cure catalyst; (ii) method of forming an disassembleable fuel cell assembly; and (iii) curable composition comprising polydiorganosiloxane having curable terminal vinyl groups having structure of formula (IA), polydiorganosiloxanes having hydride functionality having structure of formula (IB) and addition cure catalyst, and has low post-cure volatility and compatibility with proton exchange membranes. FORMULA (CALLED IA), IN CLAIM 32, PAGE 29 FORMULA (CALLED IB), IN CLAIM 32, PAGE 29    R1,R2=aryl, alkyl, haloalkyl, hydride or hydroxide;    n=25-100000;    R3=hydrogen;    R4=(un)substituted monovalent hydrocarbon group;    R5=H, or (un)substituted monovalent hydrocarbon group;    x=3-10;and    y=0-10000.    At least one R3 is within R4, when R5 is hydrogen.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic of a fuel cell.    fuel cell (10)    MEA (12)    electrodes (16A,16C)    anode (20)    cathode (22)