This standard describes the procedure recommended for application of coal tar primer covered by CGSB standard 37-GP-32M the following uses:

a. to prime new concrete, gypsum, steel or wood roof decks prior to application of thermal insulation and/or coal tar pitch built-up roofing;

b. to treat weathered surfaces of coal tar roofing prior to either recovering with a new coal tar roofing sheet or recoating with an emulsified coal tar pitch; and

c. to prime concrete or masonry prior to application of CGSB standard 37-GP-18M, tar cutback, and prior to application of CGSB standard 37-GP-33M emulsified coal tar pitch for waterproofing.

This standard may require the use of materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated with its use. Anyone using this standard has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any existing applicable regulatory requirements prior to its use.