The PVDG (Fluorocarbon) paint system combines ceramic pigmentation with polyvinylidene florid for a superior, long-lasting performance. (Usually guaranteed for a minimum of 20 years) PVF2 finishes are respected for their durability residence, and color retention. PVF2 finished meet both Kynar 500 and Hylar 5000 specifications; Kynar and Hylar are produced under license from Alf Atochem North America, Inc. and Ausimont, respectively.
ACRYLIC - Polyester-based paints are synthetic polymers which have a durable, abrasion-resistant surface. Generally these come with a three to five year warranty. A variation of this product comes with a siliconized polyester blend that provides a good chalk resistance and gloss retention. Siliconized polyesters generally come with a 10 to 20 year warranty.
Galvanized - Zinc Coating - commonly found in steel which relies on a chemical reaction of zinc, which slowly melts away while protecting the underlying metal. The thicker the coating the better the protection. The coating conforms to ASTM standard A-653 with a G60 or G90 designation which is adequate for most roofing applications.
The difference between aluminum and zinc is that the aluminum acts as a physical barrier formed by aluminum oxidation process. ASTM A-463 requires that the metal be coated with aluminum at 0.65 ounces per square foot on both sides.
Combine the chemical action of zinc and the barrier protection of aluminum. Galvalume was developed by the Bethlehem Steel Corp. and is described in ASTM A-792. This make-up is 55 percent aluminum and 43.5 percent zinc and 1.5 percent silicone. This product also goes by the name of Zincalume which is a registered trademark of BPI Steel.
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