Can the shelf life of mold silicone rubber be extended?

Taking the common condensation type 100:2 and addition molding 1:1 silicone as an example, starting from the manufacturer's production packaging, it is recommended to use it within 6 months, with no impact on performance and high usability. But if it exceeds 6 months, it is not that it cannot continue to be used. It is just that there may be precipitation and an increase in viscosity of the colloid. Therefore, when using it, it is necessary to separately stir the colloid evenly and then mix it in proportion.