Southern Polyurethanes 4:1:1 Euro Clear is a true polyurethane two-coat high solids clear with exceptional gloss and clarity that sprays easily. It’s hard to run, loves high heat and humidity, doesn’t require baking, is easy to buff and doesn’t require a flex agent. Plus, it works well with bad airflow, allowing the booth fan to be turned off as soon as the overspray is evacuated. A gallon of Euro Clear plus a quart of activator costs about $90. It’s also available in 2.1 VOC.