Liquid silicone is formed from the liquid state to the solid state of silicone. During the curing process, it is inevitable that the curing of liquid silicone may not be complete. So, what do you do when liquid silicone does not cure?

Liquid silicone is categorized into two types: industrial-grade condensation type mold silicone and addition type food-grade liquid silicone. These two types of silicone have different curing principles, hence the reasons for their failure to dry and the corresponding solutions also vary.

Industrial-grade condensable liquid silicone is a silicone mixture with 2% to 3% of a curing agent, commonly used for making large silicone molds at a relatively low cost. The curing agent for industrial-grade condensable mold silicone is an organic tin curing agent, which achieves curing primarily by absorbing moisture from the air.

Two reasons cause liquid silicone for food-grade molding not to cure or cure poorly: one is that the environmental temperature is too low, and the other is that the silicone undergoes a toxic reaction. Since molding silicone relies on temperature to catalyze the platinum water reaction, low temperatures can lead to the silicone not curing or having a sticky surface after curing. The toxic reaction in silicone occurs because it cannot come into contact with toxic substances containing nitrogen, phosphorus, or sulfur, as contact can contaminate the platinum catalyst, preventing the silicone from curing. Therefore, if the temperature is low, it's necessary to raise the environmental temperature and can also take measures to heat the area. Additionally, it is crucial to ensure the cleanliness and orderliness of the operating environment.