Can a light-curable adhesive be over-cured?
No. Additional light exposure will not promote further conversion. It is quite possible to overheat the adhesive if a UV light source is used. UV light sources often emit a significant amount of infrared radiation, resulting in an increase in the adhesive’s temperature (higher intensity lamps generally produce more infrared). In some cases, a slight discoloration may be noticed. The extent of the discoloration will depend on the intensity, time, and temperature the adhesive experiences. If this happens, the light wand should be moved back to reduce the intensity of light on the adhesive and the effect on cure determined.
