Coatings and Colors
What is a Kynar 500 coating and why does it matter for commercial roofing?
Kynar 500 is a polyvinylidene fluoride (PVDF) resin manufactured by Arkema. When formulated into a coating system containing a minimum of 70% PVDF resin, it delivers measurable resistance to UV degradation, chalking, and color fade over a 40-year service life. This is the coating chemistry that qualified manufacturers specify for commercial projects requiring long-term aesthetic consistency.
How does SMP compare to PVDF for commercial applications?
Silicone modified polyester (SMP) coatings cost less and offer adequate performance for 20 to 25 years. PVDF coatings cost more per square foot but maintain color accuracy and chalk resistance through a 40-year warranty cycle. For commercial facades visible from street level, the PVDF premium protects the property's brand presentation over the full building lifecycle.
What do chalk and fade ratings actually measure?
Chalk rating measures the powdery residue that forms on a coating surface as the resin degrades under UV exposure. Fade rating measures the measurable shift in color from the original specification. A Kynar 500 coating system typically warrants a maximum chalk rating of 8 and a maximum fade of 5 Delta E units over 40 years. SMP systems warrant higher numbers over shorter periods.
How do commercial property managers select accent colors?
Accent color selection for commercial projects starts with the building's brand identity. The metal substrate affects how the coating color renders in direct sunlight. Darker colors absorb more solar energy, which increases the thermal cycling load on clip and cleat systems. Cool roof rated colors reflect more solar radiation and may qualify for Title 24 energy compliance credits.
What coating considerations apply to vertical wall panel applications?
Vertical wall panels are viewed at eye level, which makes any coating inconsistency immediately visible. The coating must be applied at a uniform mil thickness across every panel. Touch-up paint used in the field will never match the factory bake-on finish. This is why panel profile selection and field measurement accuracy matter. Any panel that gets damaged during installation requires a factory replacement, not a field repair.
Applicable Engineering Certifications
UL 790 Class A
UL 2218 Class 4
ASTM E 2140
All coating systems specified by The Metal Roof Pros carry fire resistance, impact resistance, and water penetration certifications verified through independent laboratory testing.