Japan's Baosidao can be traced back to 1919, formerly known as Takehara Co., Ltd., its automotive supplies production business began in 1968, officially changed its name to Baosidao in 2008, and currently has a full range of independent products, its production of more than 500 kinds of automotive supplies. Prosway has two factories, one in Aichi, Japan, and the other in Shanghai, China, where Prostow's rain protection agents are also manufactured.
 
Advertised as "fluorine-free", Prosway's rain protection agents are made up of four special silicone oils combined into a "full-time silicone" formulation, which ensures both water retention and staying power without the addition of fluorine. There are two models of Baosidao's rain protection agent, the unit price of A52 is 30 yuan, which can be kept for 30-60 days after use, and the A09 is sold in China and Japan, the unit price is 60 yuan, which is better in terms of durability and can be maintained for about 90 days.
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E Luchi
Shanghai
 
Founded in 2005, E Luchi is a manufacturer of car care and beauty products, with seven series of products such as glass, paint, interior, wheels, etc., and has been rated as an excellent brand by Shanghai Auto Supplies Association for 7 consecutive years from 2007 to 2014. E Luchi's rainproof agent is similar to Japanese products in terms of modeling, the raw materials used are said to be imported, and fluorine ingredients are added, but the water repellent effect is relatively general, small water droplets will stay on the glass, and the wiper should be turned on when it rains, plus the unit price of 60 yuan, the cost performance is not high.