Besides the general energy inefficiency of glass, another weakness of glazed surfaces is the lack of privacy. A common solution to this problem has been the costly process of acid etching glass to create a frosted appearance and hinder visibility. The application of 3M’s Fasara and Scotchcal Window Films is a fraction of the cost of acid etching yet produces the same result. And unlike acid etching, you can create patterns such as company logos or geometric shapes for added visual effect.