What Is Kynar 500 (PVDF) vs. SMP Paint Systems?
Kynar 500 is a special grade of PVDF resin made by Arkema, used by licensed industrial paint manufacturers as the base resin in long-life coatings for aluminum, galvanized steel, and aluminized steel — introduced in 1965 as the original high-performance architectural metal finish. To carry the name, a licensed coating must contain a minimum of 70% Kynar 500 PVDF resin in the binder; Arkema's licensed paint companies in the Americas are Sherwin-Williams and PPG Industries. The honest warranty story is a split, not a single number. Berridge's finish warranty is the clearest verbatim example: 40 years of freedom from cracking, chipping, or peeling of the Kynar 500 / Hylar 5000 70% fluoropolymer finish — but fade is covered for 30 years at a limit of 5 Delta-E units per ASTM D2244, and chalk for 30 years at a number-8 rating per ASTM D4214. Sheffield's industry framing matches: PVDF paint warranties run 20 to 40 years for film adhesion depending on manufacturer, while the color warranty for chalking and fading on the same document is generally 10 to 30 years. SMP (silicone-modified polyester) advertises the same 40-year headline, but per Sheffield that figure is just for film adhesion, and the chalk and fade coverages on those SMP warranties are usually less than PVDF's. The visible difference shows up early: McElroy's side-by-side Louisiana installation of PVDF and SMP panels shows the SMP system's chalk and fade in a photo taken only eight years later, and McElroy — which names PVDF, SMP, and polyester as the three most popular coatings — states there is no paint system that offers performance equal to or better than Kynar 500. When comparing quotes, ask which paint system is on the panel and what the chalk and fade terms are, not just the headline year.
Important Distinction
Note: Kynar 500 is a resin, not a paint: Arkema makes the PVDF resin, and licensed paint makers (Sherwin-Williams and PPG in the Americas) formulate coatings that must contain a minimum of 70% Kynar 500 resin in the binder. The warranty terms on any finish are the panel manufacturer's, set by their registration process, not by the contractor — Zilker Roofing quotes them, it does not issue them. And a bare "40-year" claim for either system hides the split that matters: on a PVDF warranty like Berridge's, 40 years covers film integrity while chalk and fade are covered for 30; on SMP, the promoted 40-year figure is film adhesion only, with chalk and fade coverage usually shorter than PVDF's.
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Also Known As
These are the search terms and phrases that commonly refer to this topic, so you can find it however you describe it.
How Kynar 500 (PVDF) vs. SMP Paint Systems Relates to Other Topics
Paint and substrate are separate warranty layers on the same panel: a Kynar-class PVDF finish protects the surface of the Galvalume-coated steel beneath it, and each layer's coverage runs on its own clock.
The paint-system choice cuts across both metal architectures: PVDF and SMP finishes appear on standing seam and exposed-fastener panels alike, and the chalk/fade split matters in either case.
Related To Kynar 500 (PVDF) vs. SMP Paint Systems
Berridge's published finish warranty is the clearest worked example of the Kynar split: 40 years film integrity with 30-year fade and chalk terms measured under ASTM standards.
The paint layer of the warranty stack splits internally: film-integrity years and chalk/fade years differ on the same document, which is where PVDF and SMP genuinely diverge.
Questions about Kynar 500 (PVDF) vs. SMP Paint Systems?
Zilker Roofing inspects before recommending. Honest assessment, no pressure.