PRUETT-SCHAFFER

www.pruett-schaffer.com

PRODUCT NUMBER

PRODUCT NAME

69-3

CLEAR WATERBASED URETHANE COATING

GENERAL DESCRIPTION

Pruett-Schaffer’s #69-3 Clear Urethane is an very fast air-drying, water based, acrylic polyester urethane coating. It is designed as a high gloss, spray applied clear finish coat for a variety of exterior or interior maintenance applications. It exhibits good film hardness and flexibility, and excellent water, solvent, and abrasion resistance.

RECOMMENDED USES

This product is recommended for general maintenance use on a variety of substrates including existing coatings, cold rolled steel, aluminum, concrete, plastics, and composites. It will provide long term, cost effective protection against water, salt, oil, chemicals, and alkali cleaners.

SURFACE PREPARATION

At a minimum for acceptable performance, surfaces to be coated must be clean and dry, free of oil/grease, loose rust/paint, weld spatter, burning slag, dust, and chalk. Feather all rough or sharp edges. Existing coatings must be tightly adhering. Some well-cured existing coatings may need to be deglossed by sanding or abrasion for this coating to develop its best adhesion; test patches should be made to determine if adhesion is adequate.

THINNING

Add a little water at a time with constant gentle agitation to a maximum of 5% by volume.

APPLICATION EQUIPMENT

Air assisted or airless spray application is preferred. Use a .017-.020 inch tip. May be applied by brush or roller. Brushes should be of polyester or nylon construction. Rollers should have a nap thickness of 1/4 to 3/8 inch. Apply to 4-8 mils wet film thickness (1-2 mils dry film thickness).

DRYING TIME

Dries set to touch in less than 15 minutes, dries hard in 30 minutes at 77 0F and 55% R.H. Force drying ovens may be used, do not exceed 300 0F; allow 5 minutes minimum for flashoff of solvent before heating.

CLEANUP

Clean equipment with warm soap and water before the film dries.

ENVIRONMENTAL

This product meets current air pollution regulations regarding hydrocarbon and ozone reactive emissions. It is VOC compliant for the railcar maintenance industry, and contains no chromates, zinc, or free isocyanate. This product complies with current federal regulations regarding the use of lead in paint.

PHYSICAL PARAMETERS

VOC, ASTM D-3960: 1.38 lb/gal

NONVOLATILE:

By weight: 45.8 By volume: 44.0

DENSITY, ASTM D-1475: 8.59 lb/gal

DENSITY, LESS WATER: 8.84 lb/gal

ORGANIC SOLVENT, % by weight: 8.5

THEORETICAL COVERAGE:

705 ft2/gallon/mil, dry film

INITIAL GLOSS, 600: > 90

TEST DATA1

WEATHERING, Gloss retention, %:

1 year Florida exposure: > 80

1000 hr exposures:

"B Bulb", ASTM D-4587-91: > 92

Xenon Arc, ASTM G-26-92: > 94

WEATHERING, Color change, Delta E,

1 year Florida exposure: < 2

1000 hr exposures:

"B Bulb", ASTM D-4587-91: 1.6

Xenon Arc, ASTM G-26-92: 0.9

SOLVENT RESISTANCE, ASTM D-4752:

MEK (100 double rubs): pass

Toluene (100 double rubs): pass

HARDNESS:

Pencil, ASTM D-3363: H

Pendulum, ASTM D-4366: 166 sec

IMPACT RESISTANCE, ASTM D-2794:

Direct: >160 in lb

Reverse: >160 in lb

ABRASION RESISTANCE, Taber, CS-17 wheel, 1000 g, 1000 cycles: 54 mg loss

CHEMICAL RESISTANCE, ASTM D-1308:

Hydraulic fluid, 24 hr @ 150 0F: no effect

Acid, 5% H2SO4 pH 0.6, spot: no effect

Base, 5% NaOH pH 13.5, spot: no effect

Water immersion, 24 hr @ 70 0F: pass

1Film properties at 7 days air-dry, 70 0F, 50% R.H., 2 mil dry film thickness.

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.

REVISED 11-21-2000 PRUETT-SCHAFFER, 3327 STAFFORD STREET, PITTSBURGH, PA 15204

PHONE: (412) 771-2000 FAX: (412) 771-2205