As an indispensable component of a car, car lights play an important role in night lighting, traffic signals, fog collision avoidance, turning signs, etc., and are an important guarantee for safe driving of cars. In the production of automobile lamps, in order to seal the light distribution mirror and the lamp housing, a sealant must be used for bonding.

In the application of car light bonding, first of all, the car light sealant is affected by the heat emitted by the light bulb. In the corresponding high temperature environment, it must ensure that its bonding and sealing properties do not change, and at the same time, it cannot release organic gas and cause atomization. Second, when the lamp sealant is irradiated by ultraviolet rays in sunlight, the aging phenomenon such as cracking of the adhesive layer will not occur, which requires the lamp sealant to have good resistance to ultraviolet aging. performance; finally, the lamp sealant will also be eroded by water vapor and rain for a long time, to ensure that its sealing performance will not be affected by this.

Application of sealant on car lights
At present, the car lamp sealants used in China are mainly hot-melt butyl adhesive, heat-reactive polyurethane hot-melt adhesive and silicone sealant. Car lights sealed with ordinary hot melt adhesive often have problems such as water leakage, cracking of the adhesive layer, poor adhesion, and fogging, which affect driving safety. Because of its unique molecular structure, silicone sealing products have the characteristics of good adhesion, excellent high and low temperature resistance, excellent weather resistance, good water repellency, excellent electrical properties and chemical corrosion resistance. It is widely used in automotive sealing.