A complete reference of epoxy coating technologies and key considerations during the selection and use of epoxies
Epoxy coatings are generally packaged in two parts that are mixed prior to application. The two parts consist of 1) an epoxy resin which is cross-linked with 2) a co-reactant or hardener. Epoxy coatings are formulated based upon the performance requirements for the end product. When properly catalyzed and applied, epoxies produce a hard, chemical and solvent resistant finish. They are typically used on concrete and steel to give resistance to water, alkali and acids. It is the specific selection and combination of the epoxy component and the hardener component that determines the final characteristics and suitability of the epoxy coating for a given environment.
Steel, Concrete, etc. Is it suitable for the coating and the environmental exposure?
Normally above 55F for the first 72 hours of drying, and at least 5F above the dew point.
Is the coating suitable for the conditions it will be exposed to?
What performance characteristics will the coating be exposed to? (i.e. abrasion, flexibility, heat resistance, etc.)
Will it be required and within what time frame?
Is the coating designed for the specific method? (i.e. spray, brush, roll, squeegee/trowel)
Cost per mil per square foot per year of life expectancy.
Is the coating able to comply with the specifications?
Movement It is very important to have fresh air circulating over the surface during drying.
Critical, especially during cold weather and high humidity.
Do not exceed. Coating may appear usable but will exhibit poor performance.
Be aware that some epoxies yellow more than others. More noticeable in whites and off-whites.
Will odor be a concern in or around the application area? Solvent based, water-based, high solids epoxies.
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