Similar name but different chemical compositions. So MS sealant is totally different from silicone sealant.
Silicone-based sealants have the highest ozone resistance. It hardly deteriorates in a normal environment.However, deterioration may progress in a highly acidic environment. Therefore, deterioration will progress in acid rain and hot spring areas.Even so, it can be said that there is less deterioration than other urethane and modified silicone products.
Sealants rarely soften under normal conditions, but appear to be able to soften under harsh environment:
・ Chemical swell due to contact with oils and chemicals
・ Decomposition by ultraviolet rays
・ Chemical decomposition by acid and alkali
・ Oxidative deterioration due to oxygen and oxidizing agents