NanoShield is a pure Nano ceramic liquid . The chemical formula is the same as the glass formula . When dry it for 24 hours , the Nano ceramic liquid will be harden. The hardness level is 9H , the hardest level of ceramic coating . Once harden , it forms a strong layer of protection shield on the paint surface . Our products are made in the USA and proven quality assurance. The product is distributed worldwide. The technology is just only available in the last 5 years and customer begin to understand and accept the standard.