Fire-protective coatings moisture resistance

Paint compounds which do not provide these features to a satisfactory degree are either low-grade paints or merely coatings. A number of coatings have been offered on the market to provide protection against fire. Some of these are effective fire-retardant compounds, but the majority will not withstand weathering and thus have limited interior use only. To overcome this deficiency, manufacturers recommend a second or protective coat of moisture-resistant material. As an alternative means of achieving this same result, fire-retardant chemicals can be sprayed or brushed on wood and protected by a normal paint after the chemical dries. 

Moisture Resistance of Fire-Protective and Heat-Insulating Coatings for Outdoor Application... 

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