Pruett-Schaffer’s #99-12886 Inorganic Zinc Primer is a single package, moisture-curing, solvent-based, alkyl silicate primer. It will provide excellent galvanic protection against sub-film corrosion of ferrous metals in aggressive environments.

This product is recommended for use where a long-lived, heavy duty steel primer with corrosion, chemical, and heat resistant properties is required. When fully cured this primer is extremely abrasion resistant, has excellent exterior weathering characteristics, and will withstand up to 800°F un-topcoated in non-immersion service. It is recommended for immersion service un-topcoated with organic solvents, salt, and water. It provides excellent resistance when properly topcoated to heavy fumes and spills of acids, alkalis, solvents, salt, and water. This coating is electrically conductive and can be welded without appreciable reduction in the strength of the weld and with minor burn back of the coating. These characteristics, coupled with its high wetting ability and lack of tensile pull across welds and corners, makes this coating a superior pre-construction primer or shop coat.

This product is not recommended for immersion service with acids or alkali, or for un-topcoated incidental exposure to heavy fumes or spills of acids and alkalis. It will protect against mild fume exposure to these chemicals

original containers, the storage life of this product exceeds 9 months.

Available in matte finish gray or green. Custom colors available on request with minimum order.

This product meets current air pollution regulations regarding hydrocarbon and ozone reactive emissions, and contains no lead or chromate. It is not VOC compliant for the railcar or architectural maintenance industries.

Remove all weld spatter, slag, and oxides caused from welding. This primer will not adhere to existing coatings of any kind. For non-immersion service preparation of new steel: degrease and abrasive blast in accordance with SSPC-SP-6 Commercial Blast to obtain a 1-3 mil profile. For severe or immersion service or for previously coated steel: degrease and abrasive blast in accordance with SSPC-SP-10 Near White Blast to obtain a 1-3 mil profile. A

VOC, ASTM D-3960:4.0 lb/gal

WEIGHT PER GALLON, ASTM D-1475:

17.6 lb

NONVOLATILE:

By weight: 77.2 +/- 2.0 %

By volume: 44.7 +/- 1.0%

THEORETICAL COVERAGE:

718 ft²/gallon/mil, dry film

Light aromatic naphtha

84% minimum

IMPACT, ASTM D-2794:

Direct: > 120 in-lb Reverse: > 120 in-lb

ANTISAG INDEX, ASTM D-4400:> 8 mils

20 minutes air dry @ 77 °F & 50% RH

VISCOSITY, ASTM D-562:

90-95 Krebs Units