from my experience, we never install anything wet on glass. except store fronts and thats a whole 'nother story. perf is an installers dream. the big holes are great! so easy to install, and if you install in a vehicle bay like us, wait till you drive the vehicle out in the sun and the client goes "holly crap!" cause it POPS in the sun. we love it. we do what we call window wraps all day long. $199 installed and laminated. great money maker, and very good price point for the client that cant afford a wrap!