GENERAL DESCRIPTION
Pruett-Schaffer’s #30-13004 Black Universal Primer is a fast drying, solvent-based primer paint based on a phenolic modified alkyd. It is designed as a brush or spray applied, corrosion preventative ferrous metal primer. It serves as a cost-effective universal primer or tie coat, having good application properties, good exterior durability, and superior adhesion and abrasion resistance.
RECOMMENDED USES
This product is recommended for general maintenance use on rail cars, truck frames, storage tanks, machinery, and other steel structures and equipment wherever a good quality universal alkyd primer is needed. It may be topcoated with water or solvent based alkyds, acrylics, vinyls, epoxies, or urethanes. This primer is specially recommended for use over surfaces where extensive preparation will not be performed, as the alkyd formulation of this paint wets rusty and oily substrates efficiently and develops good adhesion. This primer dries very quickly, and may be used as a "dry fall" primer in areas where overspray may be a concern. The in- service temperature limit is approximately 300 F.
This product is not recommended for water immersion service or for use over wood or other dimensionally variable substrates. Although this paint exhibits good salt and chemical resistance in normal industrial environments, it is not recommended for severe chemical exposures.
SURFACE PREPARATION
For best results, substrates should be blasted to SSPC-SP-6 commercial blast with a 1 mil profile, and all rough areas and sharp edges smoothed. This coating is tolerant of less than perfect surface preparation however, and hand or power tool preparation such as brushing, sanding or water blasting may be sufficient for many applications. At a minimum for acceptable performance, surfaces to be coated must be clean, dry, free of heavy oil and grease, loose rust and paint, weld spatter, burning slag, dust, and chalk.
THINNING
Under normal conditions, no thinning is necessary; if required for proper spraying thin with xylol or toluol. Add a little at a time with constant gentle agitation to a maximum of 5% by volume. In ambient temperatures over 85 F Aromatic 100 or Aromatic 150 may be used if “dry spraying” occurs.
APPLICATION
EQUIPMENT
May be applied by brush or airless spray equipment. Airless spray gives the best results, use .015-.020 inch tip size. Brushes should be of polyester or nylon construction. Apply to 3-6 mils wet film thickness, which yields 1.5-3 mils dry film.
DRYING TIME
Dries tack free in 15-30 minutes, dry to light handling in 1 hour, dry to recoat in 2 hours at 77 F. Force drying ovens may
be used; allow 15 minutes minimum for flashoff of solvent before heating.
CLEANUP
Clean equipment with xylol or toluol 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 and maintenance industries, and contains no lead or chromate. Read and understand Material Safety Data Sheet for this product before using.
PHYSICAL PARAMETERS
VOC, ASTM D-3960: 2.86 lb/gal
WEIGHT PER GALLON, ASTM D-1475:
11.34 lb
NONVOLATILE:
By weight: 69.7 +/- 2.0 %
By volume: 51.6 +/- 1.0%
THEORETICAL COVERAGE:
827 ft2/gallon/mil, dry film
INITIAL GLOSS, 60 , ASTM D-523:1-10
VISCOSITY, ASTM D-4212: 60-70 ku
FLASH POINT, TAG CC: 46 F
TEST DATA
IMPACT, ASTM D-2794:
Direct: > 12 in-lb Reverse: > 12 in-lbs
ANTISAG INDEX, ASTM D-4400:>8 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.