PRUETT-SCHAFFER

www.pruett-schaffer.com

PRODUCT NO.

PRODUCT NAME

18-27925

WHITE EPOXY LINING or TOPCOAT

GENERAL DESCRIPTION

Pruett-Schaffer’s #18-27925 White Epoxy Lining is a high performance, two component epoxy for use as a steel or concrete protective coating or lining. This coating is formulated with state-of-the-art bisphenol F epoxy resins and a blend of phenalkamine and cycloaliphatic amine hardeners to provide maximum protection in severe exposures. It exhibits good exterior durability, very good adhesion over a variety of substrates, and exceptional corrosion and chemical resistance.

RECOMMENDED USES

This material is designed as a spray applied topcoat or direct-to-metal lining. Use to protect machinery, tanks, and structures from corrosion in aggressive environments where chemicals, salt, water, fuels, and oils are present. Formulated with virtually no solvent, this coating will spray in one pass to a dry film build of 15-20 mils, providing excellent protection over hard-to-cover sharp edges and complex geometric shapes.

SURFACE PREPARATION

For severe service, application over primer is recommended (Pruett-Schaffer #18-13275 Yellow Oxide Epoxy Primer or equivalent). Metal substrates should be blasted to an SSPC-SP-10 white metal blast with a 1.5 to 2.0 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 new or 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 or paint, weld spatter, burning slag, dust, and chalk.

MIXING AND POT LIFE

The recommended minimum application temperature is 40 0F. Mix 3 parts by volume #18-27925-A with 2 parts 18-WH Hardener. Use immediately, there is no induction time. Pot life when mixed in 4-gallon lots: 1 hour at 77 0F. Keep mixed epoxy in a cold water or ice bath to prolong potlife.

THINNING AND CLEANUP

Thin and cleanup equipment with xylol. Thin only when necessary; add a little solvent at a time to the mixed system with constant gentle agitation to a maximum of 5% by volume.

APPLICATION EQUIPMENT

Apply by airless spray equipment; use .017-.021 inch tip size and a 30:1 pump ratio with a 3-gallon per minute output. Apply 15-20 mils wet film thickness to yield 15+ mils dry film thickness.

CURE TIMES & TEMPERATURES

Cures tack free in 4-6 hours at 77 0F. Will cure down to 40 0F, but curing time will

appreciably lengthen below 60 0F. Allow 3-7 days cure at 70 0F before placing into severe service, longer if the ambient temperature is lower than 60 0F.

ENVIRONMENTAL

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

PHYSICAL PARAMETERS

VOC, ASTM D-3960: 0.12 lb./gal mixed system

WEIGHT PER GALLON, ASTM D-1475:

11.16 lbs. mixed system

NONVOLATILE, mixed system:

By weight: 98.8 +/- 2.0 %

By volume: 98.7 +/- 1.0%

THEORETICAL COVERAGE:

1582 ft2/gallon/mil, dry film

VISCOSITY, mixed system, ASTM D-562:

100 Krebs Units

COLOR, ASTM D-1729:Federal 595b #27925

POT LIFE, mixed in 4 gallon lots:

1 hour @ 77 0F

FLASH POINT, TAG CC: > 141 0F

 

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 06-19-2000 PRUETT-SCHAFFER 3327 STAFFORD STREET, PITTSBURGH, PA 15204

Phone: (412) 771-2000 Fax: (412) 771-2205