MetaGuard 670 is an optically clear, cast overlaminate, for use on Clear Vision. The 40 micron cast film is conformable to allow application to curved glass such as vehicle rear windows. Its provides uv and abrasion resistance. (For totally flat glass, use MetaGuard 600). The product is supplied on a smooth clear polyester liner ensuring the clarity of the solvent-based adhesive - refer to the technical data sheet for further details ».