Following damage size can be repaired according to BS AU251 (1994)
Zone A Damage up to 10mm        Zone B Damage up to 15mm
Zone C Damage up to 25mm        Zone D Damage up to 40mm

British Standards Institute BS AU251:1994

BS AU251:1994 was the first internationally recognised independent for windscreen repair systems. The individual tests that make up BS AU251:1994 reflect the requirements of rule EC43, the standard for windscreens. Therefore a repairs with a system that has passed BS AU251:1994 can be considered equal to the original glass. Esprit were the first windscreen repair company to pass BS251:1994. A summary of our results is shown below.

British Standards BS AU 242A:1998

This is not a performance test of windscreen repair equipment but a code of practice that gives guidance on what ca safely be repaired. The 1998 revision of BS AU242a:1998 bought the standard into line with the Department of Transports MOT test with regard to windscreen Repairs.

BS AU242a:1998 specifies that in order to carry out repairs that comply with its guidelines, you must use equipment that has passed BS AU251:1994. The Esprit system has done so, one of the many reasons that it is the system of choice of most leading windscreen & replacement companies.