How to care for Dura Coat finishes.
- 1. General
- 2. Rust Spotting
- 3. Cleaning
- 4. Graffiti and Severe Stains
Dirt pickup may cause discoloration of the finish when it had been exposed in dirt laden atmospheres for long periods of time. Additionally, slight chalking will ultimately cause some change in appearance in areas exposed to sunlight. A thorough cleaning will often restore the appearance of the product and render painting unnecessary. An occasional subsequent light cleaning will help maintain a good appearance.
On new factory-built housing, dirt pickup or staining may occur from deposits washing off the roofing prior to installation of the gutters. Unpainted, galvanized steel roofs in particular may cause stubborn staining on new siding.
For initial cleaning of this type of dirt staining, normal procedures may be adequate. A 50% solution of Stain Go cleaner in water, applied with a stiff bristle brush, should remove these stains satisfactorily. This cleaning is always followed by a thorough rinsing with clean water.
Mildew may occur in areas of high humidity and mildew spores can grow in dirt deposits, even on factory-baked finishes. To remove mildew along with the dirt, the following solution is recommended.
- 1/3 cup detergent (Tide, for example)
- 2/3 cup sodium phosphate (Soilex, for example)
- 1 quart 5% sodium hypochlorite solution (Clorox, for example)
- 3 quarts water
Strong solvent and abrasive type cleaners should be avoided, as they can damage the finish. Chalking compounds, oil, grease, tars, etc., can be removed by mineral spirits applied only to those areas which are contaminated. Always follow the use of mineral spirits with detergent cleaning and clear water rinsing. Concrete splatter must be removed immediately in order to eliminate staining. The use of acid to remove concrete splatter should only be used as a last resort.
Typical Solvent Classes Mainly for Fluorocarbon Surfaces:
Many solvents are flammable and / or toxic and should be handled accordingly. Keep away from flames, sparks, electric motors, etc. Use adequate ventilation, protective clothing and goggles.
These solvents have no permanent affect on baked fluoropolymer surfaces.
- Denatured alcohol (ethanol)
- Isopropyl (rubbing alcohol)
- VM&P Naphtha
- Mineral Spirits
These solvents should be used with caution. Limit contact to 5 minutes and test before using.
- Xylol (Xylene)
- Toluol (Toluene)
These solvents should be used with caution. Limit contact to 1 minute maximum and test before using. Some solvents may even remove the surface.
- Methyl ethyl ketone (MEK)
- Methyl isobutyl ketone (MIBK)
- Ethyl acetate
- Butyl acetate
- Lacquer thinner
- Paint remover and acetone should generally not be used.
Certain chemical solutions may be necessary to remove severe stains, mildew, mortar, etc.
- Sodium hypochlorite solution (bleach)
- Hydrochloric acid (muriatic acid)
- Acetic acid (vinegar)
Hydrochloric or muriatic acid, diluted with ten volumes of water, may assist in removing rust stains. Limit contact to 5 minutes. Caution: Acid solutions are corrosive and toxic. Flush all surfaces with copious amounts of water after use.
For additional care instructions see “Voluntary Guide Specifications for Cleaning and Maintenance of Painted Aluminum Extrusions and Curtain Walls”.