The crystallization point of the pure acetoxy cross-linking agent methyltriacetoxysilane is 41°C, so the cross-linking agent will crystallize in the low-temperature season. What is more interesting is that when the temperature is 25°C, the cross-linking agent does not crystallize, but once when the lid is opened for use, part or all of the cross-linking agent in the entire drun will crystallize rapidly. This is a normal "supercooling phenomenon" and is determined by the physical and chemical properties of the product. And the higher the purity of the cross-linking agent, the more prominent this phenomenon will be. In order to facilitate the use of downstream customers, our company will modify or mix the pure methyltriacetoxysilane according to seasonal changes and customer needs before selling it. In this way, the crystallization point of the acetoxy cross-linking agent is generally reduced to 5-25 ℃, and can meet customers' special needs in terms of storage period, strength, curing speed, etc.

The cross-linking agent that has crystallized must be completely melted before use. Otherwise, the content of the upper liquid and the lower crystal will be different, which will affect the use effect.

There are three main methods for melting acetoxy cross-linking agents for reference：

1. Baking in the oven requires constant temperature baking at 70-80°C for 3-5 days until completely melted.

2. Water bath baking, the entire drum of cross-linking agent is immersed in hot water at 70-100°C and baked for 6-20 hours to completely melt.

3. Steam baking, fumigating the sealed cross-linking agent with water vapor in a closed environment until it is completely melted.