These coatings are usually considered immersion grade epoxies and are designed to operate with the cyclical changes in temperatures under insulation on piping and equipment. The temperature cycles can affect the amount of humidity forming under the insulation. It is important that there is a solid barrier to alleviate any corrosion forming on the surface due to these cycles. It is highly recommended that these coatings be considered as part of the specification instead of an alkyd primer when designing a system using insulation. Brother’s can recommend a specific product based on the particular service requirements.