Air bubbles can be reappear after application, where air is trapped beneath the film. Any dissipated air trapped under the film, particularly on non smooth surfaces, will reappear afterwards. To avoid this, ensure that during a wet application the adhesive is wet as well as the surface. When applying dry, apply firm pressure in over lapping strokes outward from the centre of the film.

Air bubbles can also be created due to out gassing from painted surfaces or some plastics. To be sure, test a small piece for 24 hours to see if the surfaces out gasses.