PRUETT-SCHAFFER

www.pruett-schaffer.com

PRODUCT NUMBER

PRODUCT NAME

27-4

BLACK SEMI-GLOSS LINING

GENERAL DESCRIPTION

Pruett-Schaffer’s #27-3 Black Lining is a high performance, fast air-drying, water based topcoat. It is formulated from a very dense polyvinylidene copolymer, which imparts flame-retardant properties, abrasion resistance and increases the dielectric strength and breakdown voltage of the coating. This coating has very good adhesion to a variety of substrates, and is suitable for both interior and exterior use. It exhibits excellent acid, caustic, salt, chemical, and solvent resistance.

RECOMMENDED USES

This product is recommended for use as a semi-gloss, spray-applied, corrosion- resistant topcoat or intermediate coating for metal. May be used in extremely corrosive environments. This coatings' flame retardant properties result from heat induced release of water and fire extinguishing chlorine compounds, which limits the spread of the flame with much reduced smoke development. This coating is not recommended for water immersion service or for areas subject to constant temperatures in excess of 180 0F.

SURFACE PREPARATION

For best results, substrates should be blasted to SSPC-SP-6 minimum, with a 1-mil blast profile, and primed with Pruett-Schaffer #27-2 Red Oxide Primer. Feather all rough or sharp edges. This coating is very tolerant of less than perfect surface preparation however, and 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

Under normal conditions, no thinning is necessary or desirable. Thin if necessary for proper spraying with water. Add thinner a little at a time with constant gentle agitation to a maximum of 5% by volume.

APPLICATION EQUIPMENT

This paint may be applied by brush or roller or spray equipment, but air-assisted or airless spray is the preferred method. Brushes should be of polyester or nylon construction. Use roller covers with 3/8- to 1/4-inch nap. Spray equipment should be stainless steel. Use spray tips of 0.015-0.020 inch.

DRYING TIME

Dries tack free in 15-20 minutes at 77 0F and 50% Relative Humidity. Allow to dry for 1 hour if recoating with 2-component paints containing active solvents such as ketones. High humidity will prolong the dry time more so than low temperatures. To speed the dry time, good air movement over the work and local exhaust is recommended. Forced warm air-drying will reduce the dry time in cold shops, but heat lamps are not recommended as they cause accelerated surface drying and trap solvent within the paint film.

CLEANUP

Clean equipment with warm soap and water before the film dries. Run ethyl alcohol through spray guns after cleaning to prevent corrosion of steel parts.

ENVIRONMENTAL

This product meets current air pollution regulations regarding hydrocarbon and ozone reactive emissions, and is VOC compliant for the railcar and architectural maintenance industries. It contains no chromate and complies with current federal regulations regarding the use of lead in paint

PHYSICAL PARAMETERS

VOC, U.S. EPA Reference Method 24: 0.44 lb/gal

COATING DENSITY, ASTM D-1475:

11.20 lb/gal

NONVOLATILE:

By weight: 61.5 +/- 2.0 %

By volume: 47.9 +/- 1.0%

THEORETICAL COVERAGE:

769 ft2/gallon/mil, dry film

GLOSS, 600, ASTM D-523: 20-40

VISCOSITY, ASTM D-562: 75-85 KU

ANTISAG INDEX, ASTM D-4400: >8 mils

IMPACT, ASTM D-2794, in-lb:

Direct: >12 Reverse: >12 pH: 5.5-7.5

FLASH POINT, PMCC: >141 0F

TEST DATA

FLAME SPREAD FACTOR, Fs, ASTM E-162-94: 1.00

FLAME SPREAD INDEX, Is: 1 (Average)

SHORT TIME DIELECTRIC STRENGTH, ASTM D-149-93a: 698 volts/mil (minimum)

BREAKDOWN VOLTAGE, ASTM D-149-93a: 4800 (minimum)

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 09-26-2000 PRUETT-SCHAFFER, 3327 STAFFORD STREET, PITTSBURGH, PA 15204

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