Liquid Armour Prep+ is a non hazardous formula that safely breaks down wax, silicone, tar, and other contaminants that can interfere with the bond and durability of coatings and sealants. Safe on all surfaces. PH neutral and will not harm clearcoat. Disigned to be used as a final prep before applying ceramic coatings, but we have found it works great as an everday multipurpose cleaner as well.