PRODUCT NUMBER

PRODUCT NAME

28-41

NATIONAL BLUE WATER BASED PAINT

GENERAL DESCRIPTION

Pruett-Schaffer’s #28-41 Blue Paint is an air- drying, water reducible alkyd paint. It is designed as a spray-applied, high gloss, exterior finish coat for metal substrates. The cured film exhibits good flexibility, corrosion resistance, abrasion resistance, and adhesion over marginally prepared substrates.

RECOMMENDED USES

This product is recommended as a maintenance coating for equipment and machinery, sheet and tube stock, shelving, axles, grating, bins and tanks. It exhibits good application characteristics and adhesion to a wide variety of substrates including minimally prepared cold rolled steel, castings, forgings, aluminum, and existing coatings. Not recommended for immersion service or for areas subject to temperatures in excess of 300 ^F. It does contain non-toxic corrosion inhibiting pigments. The paint is not flammable and has very low toxicity.

SURFACE PREPARATION

Apply over primer (follow primer surface preparation instructions) or direct-to-metal. For best results in DTM service, substrates should be blasted to SSPC-SP-6 minimum, with a 1-mil blast profile. Feather all rough or sharp edges. This coating is very tolerant of less than perfect surface preparation however, so chemical cleaning, water blasting, or even hand or power tool cleaning may be sufficient, depending on the level of service required. At a minimum for acceptable performance, all surfaces to be coated must be clean, dry and free of oil/grease, loose rust/paint, weld

spatter, burning slag, dust, and chalk.

THINNING

Use as supplied. Thinning should not be necessary.

APPLICATION EQUIPMENT

This paint may be applied by brush, roller, dip tank application, conventional, air-assisted or airless spray. Brushes should be of polyester or nylon construction. Use roller covers with ³/₈ to ¹/₄-inch nap. Apply 1 mil dry film thickness if over primer, 1.5 mils dry film thickness if direct-to-metal. When using dip tank application, contact Pruett-Schaffer for further information regarding pH and viscosity maintenance requirements of dip tank.

DRYING TIME

Dries tack free in 15-30 minutes at 77 ^F and 50% Relative Humidity at 1 mil dry film thickness. Light handling may be possible in 30-45 minutes. 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 or forced warm air-drying will reduce dry time in cold shops. 20 min @ 120-140 F followed by 10 minutes cooling produced good results under laboratory conditions.

CLEANUP

Clean equipment with warm soap and water before the film dries or 80% water 20% Butyl Cellosolve mix. Water can be used alone but is not as effective. Run ethyl alcohol through spray equipment

after cleaning to prevent corrosion of steel parts, if not using stainless steel.

ENVIRONMENTAL

This product meets current air pollution regulations regarding hydrocarbon and ozone reactive emissions. It contains no lead or chromate.

PHYSICAL PARAMETERS

VOC, ASTM D-3960: 3.59 lb./gal

WEIGHT PER GALLON, ASTM D-1475:

8.54 lbs.

NONVOLATILE:

By weight: 27.4 +/- 2.0 %

By volume: 22.4 +/- 1.0%

THEORETICAL COVERAGE:

359 ft²/gallon/mil, dry film

INITIAL GLOSS, 60^, ASTM D-523:

> 70

VISCOSITY: 65-75 Krebs Units

pH RANGE, ASTM D-4584: 8.0-9.0

FLASH POINT, PENSKY-MARTINS CC:

>142 ^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: >20 in-lbs. Reverse> 10 in-lbs.

ELONGATION, ASTM D-522:

1/4 in conical mandrel: no cracking or flaking

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.