PRODUCT NUMBER

PRODUCT NAME

24-45-C

FLAT BLACK DTM WATERBASE PAINT

GENERAL DESCRIPTION

It is designed as a low gloss, spray applied, direct-to-metal finish coat. The cured film exhibits very good salt and chemical resistance. The low gloss hides imperfections in the metal. This version of 24-45 contains a water-repellant that improves salt-spray & salt water resistance. The coating allows high film build without sags, and the desired dry film thickness can be applied in one coat.

RECOMMENDED USES

This product is recommended for railcar and general Pruett-Schaffer’s #24-45-C Black Paint is an air drying, water based acrylic emulsion paint equipment maintenance. It exhibits exceptional adhesion to a wide variety of substrates including minimally prepared cold rolled steel, galvanized steel, existing coatings, and even aluminum without pretreatment. Use where long term exterior durability and color retention is required. Not recommended for immersion service or for areas subject to continual solvent splash.

SURFACE PREPARATION

Apply direct-to-metal or over primer (follow primer surface preparation instructions). For DTM service, substrates should be blasted to SSPC-SP-6 minimum, with a 1 mil blast profile. Feather all rough or sharp edges. This coating is very forgiving of less than perfect surface preparation, so hand tool cleaning may be sufficient for some uses. At a minimum for acceptable performance, all surfaces to be coated must be clean, dry and free of oil/grease, loose rust/paint, weld spatter, burning slag, dust, and chalk. Chalky or dusty surfaces should be power washed and allowed to dry completely.

THINNING

Under normal conditions no thinning is necessary or desirable. Thin if necessary with water only, do not use organic solvents or oils. Add water a little at a time with constant gentle agitation to a maximum of 5% by volume.

APPLICATION EQUIPMENT

May be applied by brush, roller, or airless spray. Airless spray gives the best results, 17-19 thousandths tip size. Use roller covers with ³/₈ , ½ or ¹/₄ inch nap, depending on the profile of the substrate. Brushes should be of polyester or nylon construction. Do not apply with a cup type spray gun. Apply 12.5 mils wet film to get 4 mils dry film for Direct-To-Metal applications.

DRYING TIME

Dries to recoat or stencil in 1 to 1.5 hours at 77 ^F and 50% Relative Humidity. High humidity will prolong dry time more so than low temperatures. To speed the dry time good air movement over the work and local exhaust is recommended. Heat lamps are not suitable as they tend to trap solvent within the paint film causing water sensitivity.

CLEANUP

Clean equipment with warm soap and water before the film dries.

ENVIRONMENTAL

This product meets current air pollution regulations regarding hydrocarbon and ozone reactive emissions. It contains no lead or chromate.

PHYSICAL PARAMETERS

VOC, U.S. EPA Reference Method 24:

0.67 +/- .2 lb/gal

COATING DENSITY, ASTM D-1475:

9.88 +/- .20 lbs/gal

INITIAL GLOSS, 60^, ASTM D-523:0-10

VISCOSITY, ASTM D-562: 80-90 Krebs Units

FLASH POINT, PENSKY-MARTINS CC:

> 141 ^F

NONVOLATILE:

By weight: 43.5 +/- 2.0 %

By volume: 32.8 +/- 1.0%

THEORETICAL COVERAGE:

526 ft²/gallon/mil, dry film

TEST DATA

TABER ABRASION RESISTANCE: 32mg.loss 250gram load @1000 revolutions

SPRAY EXPOSURE, ASTM B-117 and D-1654, 5% SOLUTION: 100 hrs, rust creepage from scribe: < 1 mm, several small blisters

HUMIDITY RESISTANCE, ASTM D-2247:

100 hrs: rust creepage from scribe: < 1mm, no blisters

ACCELERATED WEATHERING, ASTM G-53 WITH UV-B BULB, FOR 336 HRS:

Chalking: none Flaking: none

Checking: none Blistering: none

Cracking: none

IMPACT, ASTM D-2794: over bonderite

Direct: > 100 in-lbs

Reverse: > 70 in-lbs

ELONGATION, ASTM D-522:

1/4 in conical mandrel: no cracking or flaking after 336 hrs. in QUV weatherometer using UV-B bulb

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.