Flite-Metal's adhesive is acrylic and will not out gas after the adhesive is cured. The surface of the airframe can become quite hot if left in direct sun light. We recommend use of a canopy to shade your model when not flying. This will reduce the aircraft surface temperature. Remember, if surface of your aircraft is not cleaned properly to removed oil residue, mold release, and grease from handling, prior to covering, Flite-Metal's adhesive is not expected to adhere to the surface in the same manner as when these substances are not between the acrylic adhesive and the surface of an airframe.