At present, there are no fewer than 200 brands of explosion-proof thermal insulation film for automobiles in China. At present, only the United States and Japan have the ability to produce high-quality explosion-proof thermal insulation films. At present, foreign brands represented in China are LINTEC“FSK ",MADICO" Ray-Ban ",3M" 3M "and South China. There are too many fakes of these heat insulation films on the market. 3M has sales agents in Dongying and Dongcheng. If your car is a high-end car, you can post an authentic agency brand. Just take the local train to Huanghekou Trade City. There may be no lower price than the Yellow River Estuary Trade City. There is a lot of business and fierce competition, and the price is bound to be low. Mind you, the film contains a lot of water, so try to reduce the price. The asking price1000 above 500-600 can be negotiated. 300 out of 500 can win, and 200 100 will do. I recommend a place for you, Weiqiang Automobile Decoration in the Yellow River Estuary Trade City, at the eastern end of the southernmost road. More than 300 pieces of thermal insulation film, with a 5-year warranty. Domestic brands will not fake. I have asked several families, and there may not be anyone lower than him.