PRUETT-SCHAFFER

www.pruett-schaffer.com

PRODUCT NUMBER

PRODUCT NAME

20-3

BLACK WATER BASED SPRING PAINT

GENERAL DESCRIPTION

Pruett-Schaffer’s #20-3 Black Spring Paint is a VOC compliant, water based acrylic emulsion paint. It is designed as a semi-gloss, dip applied, fast drying direct-to-metal coating for corrosion protection of metals. The cured film exhibits very good flexibility, salt, and chemical resistance. This coating provides a .4-.6 mil thick dry film that can be applied in one economical coat when used as supplied. It does contain nontoxic corrosion inhibiting pigment.

RECOMMENDED USES

This product is recommended for use on clean steel. It exhibits exceptional adhesion to a wide variety of substrates including minimally prepared cold rolled steel, galvanized steel, existing coatings, masonry, and even aluminum without pretreatment. Not recommended for immersion service or for areas subject to continual solvent splash.

SURFACE PREPARATION

For severe service, metal substrates should be blasted to SSPC-SP-6 minimum, with a 1 mil blast profile. This coating is very forgiving of less than perfect surface preparation, so hand tool cleaning may be sufficient for some uses. At a minimum for acceptable performance, surfaces to be coated must be clean, dry and free of oil/grease, loose rust/paint, weld spatter, burning slag, dust, and chalk. Feather all rough or sharp edges. Alkyd type paints should be deglossed before being recoated. Chalky or dusty surfaces should be power washed and allowed to dry completely.

THINNING

Under normal conditions no thinning is necessary or desirable. Thin if necessary with water only. Do not use organic solvents or oils. Add

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

APPLICATION EQUIPMENT

May be applied by dipping, flow coat, brush, roller, or spray. Dipping is the preferred method of application. Dip tanks must be monitored for proper pH range to prevent flash rusting. Maintain pH between 8.8 and 9.6. Use roller covers with 3/8 to 1/4 - inch nap. Brushes should be of polyester or nylon construction. This product may be used with a cup type spray gun.

DRYING TIME

Dries to recoat in 1 to 1.5 hours at 77 0F and 50% Relative Humidity. High humidity will prolong dry time more so than low temperatures. To speed the dry time good air movement over the work and local exhaust is recommended. Heat lamps may be suitable for use but care must be exercised in heating too quickly, this may tend to trap solvent within the paint film causing water sensitivity.

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 contains no lead, chromate, or zinc.

PHYSICAL PARAMETERS

VOC, ASTM D-3960: 0.93 Lb/gal

WEIGHT PER GALLON, ASTM D-1475:

8.67 lbs.

NONVOLATILE:

By weight: 26.3 +/- 2.0 %

By volume: 22.9 +/- 1.0%

THEORETICAL COVERAGE:

368 ft2/gallon/mil

INITIAL GLOSS, 600, ASTM D-512:

40-60

VISCOSITY, ASTM D-4212: 25-30 sec # 2 Zahn

FLASH POINT, PENSKY-MARTINS CC:

Over 140 deg F

TEST DATA

SALT SPRAY EXPOSURE, ASTM B-117 and D-1654, 5% SOLUTION:

160 hrs rust creepage from scribe: < 1 mm

IMPACT, ASTM D-2794:

Direct: > 120 in-lbs. Reverse: > 120 in-lbs.

ELONGATION, ASTM D-522:

1/4 in conical mandrel: no cracking or flaking

ANTI-SAG INDEX, ASTM D-4400: >4 mils

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 PRUETT-SCHAFFER, 3327 STAFFORD STREET, PITTSBURGH, PA 15204

REVISED 12-13-2000 PHONE: (412) 771-2000 FAX (412) 771-2205