www.pruett-schaffer.com

 

PRODUCT NUMBER

PRODUCT NAME

34-68

BLACK TOUCH UP PAINT

 

GENERAL DESCRIPTION

 

Pruett-Schaffer’s #34-68 Black Touch Up Paint is a medium  gloss, air drying, solvent based alkyd paint.  It is designed as a brush or roller applied, rust preventative repair coating. It exhibits good flexibility, exterior durability, and fast dry in cold weather.

 

RECOMMENDED USES

 

This product is recommended for general maintenance use on railcars, storage tanks, machinery, and other steel equipment wherever a good quality alkyd finish is needed. It exhibits exceptional adhesion to a wide variety of substrates including minimally prepared cold rolled steel, forgings, castings, and existing coatings. This coating is specially recommended for in-the-field repairs, over rough surfaces, or where extensive surface preparation will not be performed, as the high build finish and medium gloss of this paint will hide many of the surface defects that would be readily apparent with a lower solids gloss paint. It is not recommended for immersion service or for areas subject to severe chemical exposure.

 

SURFACE PREPARATION

 

For severe service, metal substrates should be blasted to SSPC-SP-6 minimum, with a 1 mil blast profile, and primed with a good quality alkyd primer (such as Pruett-Schaffer #30-12620).  This  coating I s very tolerant  of  less than

perfect  surface  preparation, so hand tool

cleaning may be sufficient for some uses. At a minimum for acceptable performance, surfaces to be coated must be clean and dry, and free of oil and grease, loose rust and paint, weld spatter, burning slag, dust, and chalk.  Feather all rough or sharp edges.  Chalky or dusty surfaces should be power washed and allowed to dry completely.

 

THINNING

 

Under normal conditions no thinning is necessary.  Thin if necessary for spraying 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 0F Aromatic 100 or Aromatic 150 may be used if “dry spraying” occurs.

 

APPLICATION EQUIPMENT

 

May be applied by brush, roller, or airless spray.  Airless spray gives the best results over large surfaces, use .015-.020 inch tip size. If applying with a cup type spray gun, thinning may improve application. Use a brush or roller for touch up; brushes should be of polyester or nylon construction. Apply to 2-4 mils dry film thickness.

 

DRYING TIME

 

Dries to recoat in 1 to 2 hours at 77 0F.  Dry to light handling in 24 hours.  Force drying ovens may be used, allow 30 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 architectural maintenance industries, and contains no lead or chromate.

 

PHYSICAL PARAMETERS

 

VOC, U.S. EPA Reference Method 24:

3.29 lb/gal

ORGANIC SOLVENT, % WEIGHT: 33.35

WEIGHT PER GALLON, ASTM D-1475:

9.89 lb

NONVOLATILE:

   By weight:    66.7 +/- 2.0 %

   By volume:   52.6 +/- 1.0%

THEORETICAL COVERAGE:

843 ft2/gallon/mil, dry film

INITIAL GLOSS, 600 , ASTM D-523:45-60

VISCOSITY, ASTM D562:

70-82 Krebs Units

FLASH POINT, TAG CC: 25 0F

 

 

TEST DATA

 

IMPACT, ASTM D-2794:

Direct: > 80 in-lbs   Reverse: > 80 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.

 

REVISED 03-16-2000