High-tech adhesives are very reliable, and problems do not occur often. When used correctly, adhesives can resolve many design issues while also saving money, time and effort.
However, there are many possible reasons for failures when using these materials. Failure can be defined as no adhesion upon cure, reduced adhesive strength, or loss of adhesion over time. Finding the cause of a failure can sometimes be difficult, especially if the failure is intermittent or if it started after a long period of success.