Silyl modified polyether (MS polymer), defined as polymers typically featuring alkoxysilyl functional groups. Curing is a two-step process involving the conversion of the alkoxysilane to silanol and the condensation of −Si−OH and −Si−OR to form siloxane linkages upon elimination of ROH. In this study the influence of quantity (A0:0%, A1:0.3%, A2:0.6% and A3:0.9% by weight) of nano-silica on the mechanical properties of the formulated silyl-modified polyether sealant have been examined. Studies have shown that with addition of nano-silica (0.9 wt%), shear strength (0.79 Mpa to 0.98 Mpa) and elongation (108% to 151%) were improved 24.05% and 39.81%, respectively, compared with the sample without nano-silica.

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