Automobile reflectors are usually made of materials with high reflectivity and good heat resistance. Common materials include:

1. Metallized coating: Metallized coating, such as aluminum coating, is often used inside the reflector. Metallized coating has high reflectivity and good reflective performance, which can effectively reflect and focus the light emitted by the bulb.

2. Aluminizing: The reflective surface of the reflector is usually made of aluminized material, which has good reflective performance and heat resistance. Aluminized materials can better reflect and focus light and improve the lighting effect of lamps.

3. Resin: Some automobile reflectors are made of resin materials, such as polycarbonate (PC). Resin material has good light transmittance and heat resistance, and is suitable for making reflector of lamps.

4. Glass: A few high-end automobile reflectors are made of glass materials, such as borosilicate glass. Glass material has high light transmittance and heat resistance, and can provide clear light transmission effect.

5. Silica gel: Some automobile reflectors are sealed and waterproof with silica gel. Silica gel has good high temperature resistance and weather resistance, which can effectively prevent water vapor and dust from entering the interior of lamps.

To sum up, automobile reflector is usually made of metallized coating, aluminum plating, resin, glass and silica gel to ensure good reflection performance, heat resistance and weather resistance, and improve the lighting effect and service life of lamps. Consumers should comprehensively consider the characteristics of different materials according to demand and budget when choosing automobile reflector.