Q: Why vacuum defoaming before liquid silicone molding?

Vacuum defoaming before liquid silicone molding is a very necessary step. During the mixing of two-component liquid silicone, air is introduced. Without defoaming, this air remains inside the molded product, causing bubble defects that affect appearance and performance. Vacuum defoaming effectively removes air introduced during mixing, ensuring product quality. For thick-walled products and high-requirement products, vacuum defoaming is an essential process.