This British standard specifies requirements for the materials and performance of two types of strontium chromate pigmented two pack resin based primer, for air-drying at ambient temperature, for aerospace applications.

Type A materials are intended for application to chemically pretreated substrates (e.g. by a chromate conversion process) suitable for general applications.

Type B materials are similar to type A but with improved tolerance to the standard of surface preparation, and with increased chemical resistance.

The primers are for use on metallic substrates as an anti-corrosive coating on interior surfaces, or, when overcoated with a compatible finish, as a protective and decorative finishing scheme for exterior surfaces.

Information on application for type approval is provided in Annex A.