55-90 Eco-Cote WR is an economical water-based, fire resistive, water vapor retarding coating. It is designed for use on both indoor and outdoor low temperature equipment. It applies easily by brush and dries to a smooth, white flexible finish. This product is safe to use with polystyrene insulation. The vapor transmission properties of 55-90 Eco-Cote WR are comparable to similar competitive products. When industrial or commercial applications require higher vapor transmission properties, we recommend that our 55-40 Eco-Coating White be used.