These coatings are intended for application as a non-flaming, fire-protective coating for steel, aluminum, and nonmetallic substrates. Wherever possible when used on metals, the coating should be applied over a surface that has been cleaned and primed to promote adhesion and serviceability.

The paints qualified to this specification will neither actively support combustion nor contribute to the spread of a fire.

Type I, class 2 materials are designed for use in the enclosed volume of a submarine and are compatible with the operation of the atmosphere control system (emission of volatiles and thermal degradation products). class 3 coatings are specifically designed for use while a submarine is submerged and underway.

Type II materials are intended to be used where it is desired to actively protect a substrate in a fire environment.

The paint described by this specification is military unique because of the requirements that the paint be non-burning, nonhazardous, and low-smoke producing when applied to metals. Commercial products are not designed for application to metals, but are intended for use on wood or plaster board.