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Does 3M Window Films cause seal failure when applied to insulated (double-pane/Thermo pane) windows?

April 26, 2017applied cause double-pane failure films insulated seal Thermo window

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Does 3M Window Films cause seal failure when applied to insulated (double-pane/Thermo pane) windows?

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No, 3M Window Films do not cause seal failure. 3M Window Films have been installed to insulated windows for over 30 years with several millions of square feet applied to date. When recommended films are applied to the inside pane of an insulated glass unit, there will be some absorption of the sun’s energy, which will increase the temperature of the glass pane. Some of this heat will transmit to the airspace, slightly raising the airspace temperature. However, even a 20 F degree increase (unusual for most films) will result in a less than 3% change in air pressure, whereas properly made units are designed and tested to withstand 22% changes in air pressure.