1.800.283.5262

CLEANING AND MAINTENANCE GUIDE
for Metal Building Components Coated With Sheffield Kynar 500® PVDF Resin-based Coating
or Hylar 5000® Resin Paint Systems

Sheffield's Kynar 500® PVDF resin-based coating or Hylar 5000® resin paint systems are similar in molecular structure to Teflon®, a product most of us are familiar with through household use. The molecules on the surface of the coating are so tightly bound together they resist reacting with anything. The slick surface helps make them resistant to many elements found in the environment such as air pollution, acid rain, and general airborne dirt.

Although Sheffield's factory applied finishes are extremely durable, periodic cleaning to remove buildup of resins, and other residue is a suggested to extend coating life. A variety of methods for removal of surface deposits are available. Washing with plain water using hoses or light pressure spray equipment is usually adequate. When surfaces are dulled with heavy deposits of dirt or other contaminants, stronger methods may be needed.

Two precautions: (1) do not use wire brushes, abrasives or similar cleaning tools which will mechanically abrade the coatings surface and (2) certain cleaning agents listed below should be tested in an inconspicuous area before use.

GROUP A: HOT OR COLD DETERGENT SOLUTIONS

A 5% solution in water of commonly used commercial and industrial detergents will not have any deleterious effect on a fluoropolymer surface. These solutions should be followed by an adequate rinse of water. Use a cloth or sponge for application.

GROUP B: SOLVENTS

Most organic solvents are flammable and/or toxic and must be handled accordingly. Keep away from open flames, sparks, and electrical motors. Use adequate ventilation, protective clothing, and goggles. Solvents that may be used to remove non-water soluble deposits (tar, grease, oil, paint, graffiti, etc.) from fluoropolymer surfaces include: Alcohols • Denatured alcohol (ethanol) • Isopropyl (rubbing alcohol) • Methanol (wood alcohol) Note: methanol is toxic. The above alcohols have no permanent effect on fluoropolymer surfaces.

GROUP C: PETROLEUM SOLVENTS AND TURPENTINE

   • VM&P naphtha
   • Mineral Spirits
   • Kerosene
   • Turpentine (wood or gum sprits)

The above solvents have no permanent effect on fluoropolymer surfaces.

GROUP D: AROMATIC AND CHLORINATED

   • Xylol (Xylene)
   • Toluol (Toluene)
   • Perchlorethylene (Perclene)
   • Tricholorethylene (Triclene)

Note: Perchlorethylene and Tricholorethylene are toxic.

The above solvents should be used with caution on fluoropolymer surface and in contact with solvent to five minutes maximum and test before using.

GROUP E: KETONES, ESTERS, LACQUER THINNER AND PAINT REMOVER

   • Methyl isobutyl ketone (MIBK)
   • Ethyl acetate (nail polish remover)
   • Butyl acetate
   • Lacquer thinner
   • Paint remover (non-flammable)

The above solvents should be used cautiously on a fluoropolymer surface. Limit contact of fluoropolymer surface and always test before using. Note: There are many formulations of paint remover on the market. It is possible that some will remove the fluoropolymer surface. Proceed very cautiously in use of paint remover. The metal supplier and coating manufacturer are not responsible for damage from unrestricted use.

GRAFFITI

Graffiti presents a special problem because of the many possible agents used, (generally) aerosol paint. It is best to try the less active solvents first (Solvent Group A, B, C and D), then try stronger solvents (Solvent Group E). If none of these are satisfactory, it may be necessary to resort to touchup, repaint or replacement, depending on the extent of the damage.

CHEMICAL SOLUTIONS

Mildew: In areas subject to high humidity levels, dirt and spore deposits can permit mildew growth to occur. The following solution is recommended to remove mildew when necessary:
   • 1/3 cup dry powdered laundry detergent (such as Tide®)
   • 1 quart sodium hypochlorite 5% solution (such as Clorox®)
   • 3 quarts water

Rust Stains: Hydrochloric, citric acid or muriatic acid, diluted with ten volumes of water, may assist in removing rust stain from fluoropolymer surfaces. Limit contact to five minutes. Oxalic acid solutions or acetic acid (vinegar) may be used for the same purpose. Flush with water. Caution: acid solutions are corrosive and toxic. Flush all surfaces with copious amounts of water after use and ensure proper ventilation in the work space.