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AAMA 2603 and AAMA 2604 Coating Specifications Explained

Updated: Apr 4, 2023

AAMA (American Architectural Manufacturers Association) coating specifications are used to determine the performance of coatings on architectural aluminum products. Two of the most common specifications are AAMA 2603 and AAMA 2604. While both specifications are designed to provide high-performance coatings, there are some key differences between the two.



AAMA 2603 is the lower-end specification and is generally used for coatings on aluminum products that are exposed to indoor or low-exposure environments. This specification is commonly used for applications such as window frames, door frames, and other architectural components that are not exposed to harsh weather conditions or pollutants. AAMA 2603 coatings provide basic color retention and resistance to weathering and chalking.


On the other hand, AAMA 2604 is a higher-end specification that is used for coatings on aluminum products that are exposed to harsher weather conditions, such as rain, snow, and high levels of UV radiation. This specification is commonly used for applications such as metal roofs, wall panels, and other architectural components that are exposed to outdoor environments. AAMA 2604 coatings provide excellent color retention and resistance to weathering, fading, and chalking.


The key difference between AAMA 2603 and 2604 specifications is the level of performance they provide. While AAMA 2603 coatings provide basic protection against weathering and chalking, AAMA 2604 coatings offer higher levels of protection against harsh environmental conditions. AAMA 2604 coatings are thicker and more durable, providing better color retention and resistance to fading, chalking, and cracking.

When choosing a coating specification for architectural aluminum products, it is essential to consider the application and environment in which the product will be used. While AAMA 2603 coatings may be suitable for indoor or low-exposure environments, AAMA 2604 coatings may be necessary for outdoor applications that are exposed to harsh weather conditions.

In conclusion, AAMA coating specifications 2603 and 2604 are designed to provide high-performance coatings for architectural aluminum products. While AAMA 2603 is suitable for indoor or low-exposure environments, AAMA 2604 is necessary for outdoor applications that are exposed to harsh weather conditions. Choosing the appropriate coating specification for a particular application is essential to ensure the long-term performance and durability of the product.



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