Why isn’t the silicon mold acid & alkali and aging resistant?

It is also due to the addition of to much silicon oil. Normally we do not advise our customers to add any silicon oil into the silicon rubber. If it is necessary, the ratio must be 5%-10%.The silicone oil will destroy the molecular weight of silicone rubber, so the mold will show the lack of acid and alkali-resistance and aging resistance

2019-04-17