GENERAL DESCRIPTION
Pruett-Schaffer’s #75-12 Green Heat Resisting Paint is a single package, heat curing coating made with 100% silicone resin. When properly heat cured, it will provide superior protection against corrosion of ferrous metals in extremely high temperature environments.
RECOMMENDED USES
This product is recommended as an interior or exterior topcoat where a premium corrosion-resistant coating is needed for ferrous metals exposed to:
1. continuous temperatures up to 800 F, wet or dry;
2. intermittently or continuously cycling temperatures in the range of 450 to 800 F, wet or dry;
3. thermal shock due to rapid service temperature variations, rainfall, or steam.
It has very good salt resistance, but is not recommended for continuous water immersion service; or for exposures involving mineral acids, alkalis, or oxidizing agents.
SURFACE PREPARATION
All surfaces to be coated must be clean, dry, free of mill scale, oil and grease, rust, paint, weld spatter, burning slag, dust, and chalk. Substrates should be degreased and blasted to SSPC-SP-5 (white metal blast cleaning), with a profile of < 0.2 mil; all mill scale must be removed. This product must then be applied immediately.
For service temperatures below 750 F, a
heat resisting inorganic zinc primer, such
as Pruett-Schaffer’s #99-12886 or equivalent, may be used to increase corrosion resistance.
THINNING
If desired, thin with xylol or toluol. Add a little at a time with constant gentle agitation to a maximum of 5% by volume.
APPLICATION
EQUIPMENT
May be applied by brush, air-assisted or airless spray equipment. Airless spray gives the best results, use .015-.020 inch tip size. Brushes should be of polyester or nylon construction.
APPLICATION INSTRUCTIONS
Apply evenly to 1-2 mils wet film thickness, which will yield a 0.3-0.6 mil dry film per coat. Avoid heavy overlap and do not exceed 5 mils wet film thickness (1.5 mils dry film), or high temperature resistance will be reduced. Do not apply when substrate temperature is within 5 F of the dew point or greater than 140 F. Keep the film dry until heat curing is finished, do not paint outside late in the day when condensing conditions are expected.
AIR DRYING TIME
Dries tack free in 1 hour at 77 F, dries to light handling in 4-6 hours. This coating should be heat cured following application, or it will not develop the desired maximum high temperature resistance. Keep the film dry until heat curing is finished.
HEAT CURING
Allow to air dry to a tack free state, then cure within 24 hours of application by heating to 450 F for a minimum of 1 hour. Heat curing must be performed, or reduced service life will result.
CLEANUP
Clean equipment with xylol or toluol before the film dries.
ENVIRONMENTAL
This product contains no chromate, and complies with current federal regulations regarding the use of lead in paint. Read and understand the Material Safety Data Sheet for this product before using it.
PHYSICAL PARAMETERS
VOC, ASTM D-3960: 5.34 lb/gal.
WEIGHT PER GALLON, ASTM D-1475:
9.80 lbs
NONVOLATILE:
By weight: 45.5 +/- 2.0 %
By volume: 25.8 +/- 1.0%
THEORETICAL COVERAGE:
414 ft2/gallon/mil, dry film
INITIAL GLOSS, 60 , ASTM D-523: 10-40
VISCOSITY, ASTM D-512:
73-79 Krebs Units
FLASH POINT, TAG CC: 81 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.