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PRODUCT NUMBER	PRODUCT NAME
66-16293-1	GRAY POLYURETHANE COATING

GENERAL DESCRIPTION Pruett-Schaffer’s #66-16293-1 Gray Polyurethane is a two component, air drying, solvent thinned, polyisocyanate cured polyester coating. It is designed as a spray applied, heavy duty, high gloss direct to metal anticorrosive coating. RECOMMENDED USES Use to protect metal conduit from corrosion in aggressive environments where chemicals, acid, alkali, salt, water, fuels, and oils are present. This coating exhibits excellent flexibility and resistance to impact cracking, and has very good adhesion to difficult metal substrates. It is not recommended for immersion service. SURFACE PREPARATION Remove all oil, grease or foreign substances with chemical, detergent or solvent cleaning. MIXING INSTRUCTIONS Mix 3 parts by volume #66-16293-1 with 1 part 66-3 Hardener. Product should be applied with plural component spray equipment ONLY. 66-16293-1 Component will not dry unless mixed with 66-3!	THINNING Thin if necessary for spraying with xylol or methyl isobutyl ketone. Add a little solvent at a time to the mixed system with constant gentle agitation to a maximum of 5% by volume. APPLICATION EQUIPMENT May be applied by air assisted or airless spray. Diameter of conduit will determine tip size to use. Apply at 5 mils wet film thickness to yield 2 mils dry film thickness. Best results are obtained from films of 1-2 dry mils, films thicker than 2 mils may bubble. Apply when air and substrate temperatures are between 50-110 ^0F. CURE TIMES & TEMPERATURES Cures set-to-touch in 1.5 to 3 hours at 75 ^0F, cures to handle in 24 hours. Although re-coating is not normally necessary, the coating may be touched up or recoated. The recoat window is 8 to 48 hours; waiting longer may result in reduced adhesion of the second coat. Allow 7-10 days cure at 75 ^0F before placing into severe service, longer cure times may be necessary if the ambient temperature is significantly lower. Shipping damage may be repaired with #45-1 Gray Vinyl Touchup compound.	CLEANUP Clean equipment with xylol or methyl isobutyl ketone before the film cures. ENVIRONMENTAL This product contains no lead, chromate, or zinc. PHYSICAL PARAMETERS VOC, ASTM D-3960: 4.81 lb./gal for Gray component WEIGHT PER GALLON, ASTM D-1475: 8.53 +/-.2 for Gray component NONVOLATILE, By weight: 43.6 +/- 2.0 % By volume: 32.0 +/- 1.0% Gray component THEORETICAL COVERAGE: 514 ft^2/gallon/mil, dry film VISCOSITY, 20-35 seconds #2 Zahn Cup MIX RATIO, by volume: 3 parts 66-16293-1 to 1 part 66-3 FLASH POINT, TAG CC: 20 ^0F mixed INITIAL GLOSS, 60^0, ASTM D-523: 90 IMPACT RESISTANCE, ASTM D-2794: Direct: 320 in-lbs Reverse: 320 in-lbs ADHESION, ASTM D-3359: 5B, No flaking SALT SPRAY RESISTANCE: > 96 hrs. HEAT STABILITY: No degradation or odor at 850 degrees F. for 10 seconds
THIS INFORMATION RESULTS FROM TESTS CONDUCTED IN A LABORATORY UNDER LABORATORY CONDITIONS. DIFFERENT RESULTS MAY BE OBTAINED IN COMMERCIAL USE OF THIS PRODUCT UNDER FACTORY OR FIELD CONDITIONS. PRUETT-SCHAFFER MAKES NO WARRANTY CONCERNING THE SUITABILITY OF THIS PRODUCT FOR THE END USE CONTEMPLATED BY THE BUYER, EXCEPT THAT THE PRODUCT SHALL BE IN COMPLIANCE WITH THE TECHNICAL SPECIFICATIONS PRESENTED HEREIN.

QC IDENTIFIER: E26

REVISED 09-16-2004