Holiday testing is a non-destructive test method applied on protective coatings to detect unacceptable discontinuities that affect the integrity of linings such as pinholes and voids. The test involves checking an electric circuit to see if there is insufficient coating to resist the electrical charge and current flows to complete the circuit. If electrical flow is detected then it indicates the presence of a pinhole or a holiday (discontinuity). Holiday testing is also known as continuity testing.
