There are two kinds of chassis protection, one is plastic enclosure and the other is protective armor. Chassis sealing is a kind of chassis care technology. A kind of flexible rubber resin with high adhesion, high elasticity, high corrosion resistance and moisture resistance is sprayed on the chassis to isolate it from the outside world, thus achieving the effects of anti-corrosion, anti-rust and anti-collision, and at the same time isolating some noise from the bottom. Plastic packaging construction of chassis is more troublesome. First, carefully remove the oil stains on the chassis, and then thoroughly remove the asphalt and oil stains with a special cleaner before drying. Any negligence in these treatments will affect the firmness of "plastic packaging". Then the transmission shaft, exhaust pipe and other parts that need heat dissipation are sealed with tape and sprayed with plastic. In order to avoid accidental damage and affect its normal operation. Chassis Protective Armor In order to overcome the shortcomings of traditional automobile chassis packaging in terms of protective strength, durability and stability, a new type of automobile maintenance project-"Chassis Protective Armor" was produced. It means that the chassis will be sprayed with more advanced materials than the "chassis sealing plastic". "Chassis protective armor" is a material infrastructure with rubber sealant instead of oil, paint, asphalt and so on. According to the different physical and chemical characteristics of various materials, multi-component combined products are developed to make these products have excellent characteristics such as high density, waterproof and antirust, acid and alkali resistance, heat and cold resistance, elastic and wear resistance, non-toxic and environmental protection, thus overcoming the shortcomings of traditional materials in terms of protective strength and stability.