SGS Certified ceramic coating SGS Certified ceramic coating Beware of duplicate ceramic coating which is available online and most of outlets which are on rent are using it which is not certified and have its effect for 3-4 months after which if detailer is available will do it again which harmful for your car similarly to Teflon coating. So choose detailers who have strength to serve you in long terms and who have more then at least 5 outlet for Toyota Hycross