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The Curing Mechanism for condensed and cured silicon the result of the hydrolysis and the condensation reaction of Silanol(Si-OH), the main component, and a crosslinker(Si-X). The existence of water is essential in this reaction, and a catalyst is required. Reaction (1) indicates the state inside the storage container - the state where the bottom of the polymer is sealed with a crosslinking agent - and is stabilized under the condition of no moisture. When exposed to moisture as in (2), parts of X is replaced with OH and then go through the condensation reaction, producing polymer crosslinkings as in (3). These reactions occur sequentially and finally produce elastic gum.