Our car cement cleaning spray kit contains sodium bicarbonate and lauryl ether 7. It can be easily removed without scraping or grinding off the cement. Its use method is very simple: 1. Spray the cleaner on the position of the car to be cleaned, wipe it back and forth with a sponge, and then rinse it off with water. 2. Dry surfaces with a towel. And has a unique spray design, easy to use.