EFCO Special Purpose Windows General Maintenance Instructions - Manual (Page 5)

General Service and Maintenance Manual
SECTION 2
GLASS CARE MAINTENANCE AND CLEANING
2.b. CLEANING OF COATED OR REFLECTIVE SURFACES
Clean coated glasses with a solution of mild soap or other mild detergent in
water with a maximum concentration of 2%. Apply this with grit free clothes or
sponges, followed immediately by rinsing the glass and surrounding areas with
a high volume of clear water and removal of excess rinse water with a
squeegee. Do not allow the soap solution to dry on the surface. Remove grease
and glazing materials with commercial solvents such as xylene, toluene, mineral
spirits or naptha and follow with normal wash and rinse. Be careful not to
damage glazing or insulating unit seals by over generous applications of strong
solvents. Comply with solvent manufactures directions on label for toxicity and
flammability warnings.
Because fingerprints, grease stains, smears, dirt, scum, sealant residue,
scratches, and abrasions (on either surface) are more noticeable on reflective
glasses than on non-reflective glass. Take extra care in cleaning to be sure that
gritty dirt particles picked up by the cloths do not scratch the glass.
Coated glasses should be cleaned at least 3-4 times per year so that materials
such as metal irons, alkali rundown from concrete, stucco, etc. are not permitted
a long residence time on the coated glass surfaces. As residence time of the
stain increases, there is an increasing probability that diffusion into the coating
will occur. This results in a more difficult stain to remove and could damage the
coating.
Do not use harsh cleaners, abrasive cleaners, alkaline materials, fluoride salts,
chlorine based cleaners or hydrogen producing compounds.
NOTE: All cleaning products must be completely rinsed from the glass
and surrounding surfaces before the process is complete.
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