Do Scotchtint films cause seal failure when applied to insulated windows?
No. When recommended films are applied to the inside pane of an insulated glass unit, they will absorb some absorption of the sun’s energy (except for clear safety films), increasing the temperature of the pane. Some of this heat will transmit to the airspace, raising its temperature slightly. However, even a 20°F degree increase (unusual for most films) will result in a less than 3 percent change in air pressure; properly made units can withstand 22 percent changes. The risk of seal failure depends largely on the quality of workmanship and materials; it’s best to purchase units from reputable window manufacturers who have experience with insulated units.
