Our Secure Car Sign Defender Spray contains Itanium Dioxide, Trimethylchlorosilane, Disodium EDTA. It can block cameras, protect your private information, prevent the license plate from being used for illegal purposes, and effectively protect the surface of the license plate from rain, dirt, etc. And extend the service life of the license plate. Its use method is very simple: clean the license plate, spray the product on the license plate. It can protect private privacy and extend the service life of the license plate.