Pruett-Schaffer’s #69-1 Clear Urethane is an very fast air drying, water based, aliphatic polyester urethane coating. It is designed as a medium to 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.

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

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

Under normal conditions no thinning is necessary; if thinning is desired add a little water at a time with constant gentle agitation to a maximum of 5% by volume.

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).

Clean equipment with water before the film dries.

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 lead, chromate, zinc, or free isocyanate.

VOC, ASTM D-3960 2.74 lb/gal

WEIGHT PER GALLON, ASTM D-1475:

8.81 lbs

NONVOLATILE:

By weight: 30.3 +/- 2.0 %

By volume: 26.6 +/- 1.0%

THEORETICAL COVERAGE:

427 ft²/gallon/mil, dry film

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

12 mg loss

QUV, condensing 20 minute cycle, gloss retention at 1030 hr, %:

88.5%

Retains film integrity

SOLVENT SWELL, % swell after 24 hr immersion at room temperature:

Linear Volume

Water 5 16

IPA 25 95

MEK 35 145

Xylene 25 95

Tensile strength, psi: 5900

Elongation at break, %: 190