Is it better to use cold glue or hot glue in car headlights?

The biggest difference between cold glue and hot glue is that hot glue is reversible, just like water turns into ice and ice returns to water. After the hot glue is cured, put the lamp in the oven 120 degrees to bake, and the glue is basically soft. Cold glue is irreversible, just like an egg that is cooked and can't go back.

The structure of each headlight is different, and the power of the bulb used is also different. Some lamps have high temperature, while others have low temperature. Generally speaking, according to the temperature inside the lamp, it is suggested that the glue type of the car factory should be decided by the main engine factory. Hot glue has good stability and air tightness, the cooling and curing time is about 3 minutes, and cold glue takes more than 24 hours. Moreover, the cold glue must be pretreated by plasma, and the air tightness is difficult to guarantee due to multiple processes.