PRODUCT NUMBER

PRODUCT NAME

13-7

LOW GLOSS GRAY FAST DRY EPOXY/ PRIMER

GENERAL DESCRIPTION

Pruett-Schaffer’s #13-7 Gray Epoxy is a two component, phenalkamine cured bisphenol A epoxy for use as a heavy duty maintenance primer or low gloss topcoat. It is designed as a low-gloss, brush or spray applied, corrosion resistant, ferrous metal coating. It exhibits excellent adhesion over a wide variety of substrates, and exceptional corrosion and chemical resistance. Quick cure times allow recoating within a single 8 hour shift.

RECOMMENDED USES

Use to protect machinery, tanks, railcars and structures from corrosion in aggressive environments where chemicals, salt, water, fuels, and oils are present. Formulated to allow high film build in one pass to protect hard to cover sharp edges. Suitable for topcoating with a wide variety of epoxy, urethane, vinyl, or acrylic emulsion topcoats. May also be used as an encapsulation coating. This epoxy will chalk, topcoating is necessary for long term weathering exposure.

SURFACE PREPARATION

For severe service, metal substrates should be blasted to an SSPC-SP-10 white metal blast with a 1.5 +/- .5 mil blast profile. An SP-6 commercial blast may be sufficient for many repair or DTM applications with less severe requirements. This coating is very tolerant of poor surface preparation; for tightly adhering existing coatings, degreasing and hand tool cleaning, power washing, brush blasting, sanding, or a combination

of these methods may be acceptable. All surfaces to be coated must be clean, dry and free of oil and grease, loose rust and paint, weld spatter, burning slag, dust, and chalk.

MIXING INSTRUCTIONS

Mix 4 parts by volume #13-7-A with 1 part 13-7-B Hardener. Mix at slow speed to avoid entraining air into the paint. Use at once, there is no induction time.

THINNING

Thin if necessary for spraying with xylol or toluol. Add a little solvent at a time to the mixed system with constant gentle agitation to a maximum of 5% by volume.

APPLICATION EQUIPMENT

May be applied by air assisted or airless spray. Airless spray gives the best results, use .015-.020 inch tip size. Apply 4.5-7 mils wet film thickness to yield 3-5 mils dry film thickness. Application with a cup type spray gun is not recommended.

CURE TIMES & TEMPERATURES

Cures set-to-touch in 1.5-2..5 hours at 77 ^F, and dry to handle or recoat in 3-4 hours. Topcoat within 3-48 hours or reduced adhesion of the second coat may result. Allow 7-10 days cure at 70 ^F before placing into severe service, longer if ambient temperature is lower. Recommended minimum application temperature is 40 ^F. This product WILL cure at temperatures below freezing!!

This product will post yellow! This product can be modified by using exempt solvents ie Acetone/ Tertiary butyl acetate to get lower VOC's if desired. Speed of cure can be modified by increasing or decreasing accelerator depending on shop conditions.

CLEANUP

Clean equipment with xylol or toluol before the film cures.

ENVIRONMENTAL

This product meets current air pollution regulations regarding hydrocarbon and ozone reactive emissions. It is VOC compliant for the industrial & maintenance industries, and contains no lead, chromate, or zinc.

PHYSICAL PARAMETERS

VOC, ASTM D-3960: 2.31 lb/gal mixed system

WEIGHT PER GALLON, ASTM D-1475:

12.06 lbs mixed system

NONVOLATILE, mixed system:

By weight: 80.8 ± 2.0 %

By volume: 66.7 ± 1.0%

THEORETICAL COVERAGE:

1070 ft²/gallon/mil, dry film

INITIAL GLOSS, 60^, ASTM D-523:

10-20

VISCOSITY, mixed system, ASTM D-562:

75-85 Krebs Units

POT LIFE, mixed in 5 gal lots:

2-4 hrs @ 77 ^F; 1-2 hrs @ 90 ^F

FLASH POINT, TAG CC: 48 ^F

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.