In-tumescent Paint
mortar-cement based, gypsum
generally classified as cement based, gypsum based, or sprayed fiber. There are some products which may not require surface preparation, but most require the removal of oils, grease, dirt, and debris from the HDG surface at a minimum. For such materials, solvent cleaning per SSPC-SP 1 should provide sufficient cleaning.

Intumescent Paint, Fireproofing, and Firestopping. Intumescent coatings, often referred to as intumescent paint, are used in buildings as a passive fire resistance measure. They can be applied to structural members as an aesthetically pleasing fireproofing product.
This coating, commonly referred to as poly coating, is used in virtually all industrial markets to provide a smooth durable finish that has superior resistance to corrosion, abrasion, and chemical exposure. Polyurethanes are normally used to topcoat high build epoxy and inorganic zinc. Polyurethane Coatings Statistics