The reason is that the rubber ingredients come into contact with sulfur or sulfur-containing products. Many companies do not have dedicated fluorine rubber mixing machines. Often, after mixing other sulfur-containing rubber materials, they are not cleaned properly, or the ingredients are accidentally contaminated with sulfur or water, thus causing the rubber to be mixed with sulfur. It can combine with the accelerator in fluorine rubber to cause scorch, or the surface of fluorine rubber can be activated and decomposed due to the action of water. The solution is to use a special machine. If this is not possible, the baffle and the material tray must be completely cleaned before switching to fluorine rubber mixing. Absolutely avoid contact with water and sulfur. Use special tools for batching. A spoonful of ingredients to prevent cross-contamination. Calcium hydroxide and magnesium oxide remain sealed and ready for use.