PVDF coatings are made of PVDF fluoropolymer resin and inorganic ceramic pigments. They are factory applied on aluminum and steel coil stock and extrusions for architecture and can last for decades without chalking or color change. Products that can be applied in the field are also available. PVDF coatings are among the most durable of coatings yet developed. There are several types of PVDF coatings: coil and extrusion PVDF coatings, liquid PVDF spray coatings and powder PVDF coatings. Few coatings companies supply PVDF coatings since all PVDF coatings suppliers must obtain licenses from PVDF resin suppliers, AtoFina and Solvay, who are the only two suppliers of PVDF resin with the trade name Kynar 500 and Hylar 5000. PPG, Valspar, Rohm & Hass and Akzo are the main liquid PVDF coatings suppliers. Rohm & Hass and FineShine are the main PVDF powder coatings suppliers.
The alternative flouropolymer used in coatings is FEVE, flouroethylene vinyl ether.
Information on Factory Application on Architectural Metals
Valspar Technical Paper on PVDF
PVDF Coatings Review on Engineersedge.com
How to Decide Between Anodizing, Painting, and Powder Coating
Provided by SAF (Southern Aluminum Finishing), aluminum sheet and extrusion distributor
Field Application Products
APV Engineered Coatings Introduces NeverFade® Façade Restoration For Architectural Metal Applications
APV Engineered Coatings NeverFade® primer and topcoat systems for restoration of architectural metal including wall panels, window and door frames, roofs, railings, overhangs and decorative features. In water based formulations with Kynar Aquatec® and solvent based formulations with Kynar® PVDF, the new NeverFade® Façade Restoration coatings are for use with carbon steel, stainless steel, bare aluminum and anodized aluminum.
PPG Corporation Coroflon® Fluoropolymer
CORAFLON® ADS is a field-applied, two-coat system composed of a universal primer and a fluoropolymer topcoat that requires little maintenance. It can be used on properly cleaned and pre-treated aluminum, clad steel, concrete, glass, or plastic substrates. CORAFLON ADS cures chemically into a durable, inert fluoropolymer coating that is highly wear and weather resistant. Bright, vivid colors, including metallics, are available in a wide range of gloss levels (20 – 80%).
Curtain Wall Restoration Using Field Applied Fluororpolymer High Performance Coatings
This white paper includes the history of fluoropolymer development, information on the chemistry and physical properties of PVDF coatings, applications for the material, surface preparation and coating application information.
Tnemec Corporation Series 1070 Flouronar® Advanced Thermoset Solution Fluoropolymer
Advanced, high-solids, two-part, thermoset solution fluoropolymer that provides an ultra-durable finish. Series 1070 products can be applied with brush, roller and conventional spray equipment. It maintains color and gloss even in the most severe exposures. Under certain conditions it may be used to restore aged, factory applied fluoropolymer coatings or for OEM applications. Tnemec’s Technical Services and local representatives can provide details.
Hallidie Building in San Francisco, California, Restoration
SSPC-SP6/NACE No. 3 Commercial Blast Cleaning established the criteria for the Ornamental components on this historic structure while window frames, sashes, metal grates and railings were prepared in accordance with SSPC-SP10/NACE No. 2 Near White Blast Cleaning. These components was primed with Series 90-97 Tneme-Zinc, an aromatic urethane, zinc-rich primer. Repaired and replaced components were primed with Series 135 Chembuild, a modified polyamidoamine epoxy,.The specified intermediate coat was Tnemec Series 1075 Endura-Shield II, an aliphatic acrylic polyurethane coating. Nearly 235 gallons of Series 1075 was used. Blue-colored components received either Series 1071V Fluoronar, a low-VOC semi-gloss fluoropolymer coating, or Series 1072V Fluoronar, which offers a satin finish. Gold accented components received a coat of Series 1078 Fluoronar Metallic, followed by a clear coat of Series 1079 Metallic Clearcoat. Interior Structural steel outriggers were primed with Series 115 Uni-Bond DF, a hydrophobic acrylic coating, followed by a coat of Series 1029 Enduratone, a High Dispersion Pure acrylic polymer coating.
For Roofing
GAF Topcoat® Liquid Applied Roofing
The Garland Company
Solex Kynar PVDF resin based white roof coating.
