Composites

Post Paint Compatibility of Dibond®

On many projects that involve Dibond® material, a small quantity of "custom color" panels is often required. It is often not practical to obtain the "custom color" from the factory and post painting is necessary.

OVERVIEW

On many projects that involve Dibond® material, a small quantity of “custom color” panels is often required. Because of the limited quantity, it is often not practical to obtain the “custom color” from the factory and post painting is necessary. Several of the paint manufacturers have tested their products for use with Dibond® material. Following is a list of the paint suppliers, and the materials needed for post painting.

Painting should be done by qualified persons with experience in this type of application.

PREPARATION

The first step in the post painting process is an assessment of the substrate concerning the cleaning, pretreating and priming required prior to application of the finish. There are no standard procedures for all possible situations due to the variety and condition of the surface to be painted. Before painting, testing should be done on a small area to determine that the preparation, application, and adhesion of the finish are satisfactory. The coating adhesion between the post paint finish and the original coating must be carefully evaluated using common coating adhesion testing procedures. Also, color and gloss matching needs to be evaluated to provide an acceptable final appearance. If testing indicates poor adhesion, do not proceed. Contact the coating manufacturer for additional recommendations.

Metallic colors are difficult to repair and special procedures must be followed. Spray applications will not reproduce identical metal flake alignment obtained in the factory-applied finish. This is due to the application differences between coil-coated and post painted finishes.

APPLICATION

Before painting, always check the coating manufacturer’s application guidelines and follow the specific instructions shown on the product data sheet and application instructions. For specific recommendations or questions, contact your coating representative. The surface to be painted must be clean, dry and free of dust, dirt, oil, grease and foreign contaminants. Clean the surface according to the paint manufacturer application guidelines.

If recommended by the paint manufacturer, the curing of some paints may be accelerated through a moderate increase in temperature. For composite material, the temperature must never exceed 140°F. Where sanding is necessary, do not sand through coating to metal substrate.

EVALUATED POST PAINT FINISHES

SURFACE PREPARATION PRIMER TOP COAT
Akzo Nobel, 800-233-3301 or 770-662-8464
Degrease with Grip-Gard® M-600
Wax & Grease Remover.
Sand surface with 320-360 grit paper dry
Grip-Gard®
Degrease with Grip-Gard® M-600 Wax & Grease Remover. Grip-Gard® HS
Grip-Gard® Plus
Meta-FlexMeta-Flex®
Carbit Paint Co., 312-280-2300
Clean surfaces with a 50/50 blend of Isopropyl Alcohol and water Carbithane® 11 Series
Carbithane® 12 Series
Dupont Industrial Coatings, 800-338-7668
Scuff sand with red Scotch Brite pad, clean with H-69 Isopropyl Alcohol Imron® 333 Line Polyurethane Enamel, Imron® 1.2 Waterborne Copolymer WG
Scuff sand with red Scotch Brite pad, clean with H-69 Isopropyl Alcohol Imron® 1.5 Waterborne Copolymer Primer WF Imron® 1.2 Waterborne Copolymer WG
Scuff sand with red Scotch Brite pad, clean with H-69 Isopropyl Alcohol Corlar® VHS 90P Epoxy Mastic Primer Imron® 333 Line Polyurethane Enamel
Matthews Paint Co., 800-323-6593 or 262-947-0700
wipe down with 45330SP Speed Prep Cleaner, abrade with 320/400 grit or red Scotch Brite pad and wipe down with 45330SP Speed Prep Cleaner MAP®
VOC MAP®
Satin VOC MAP®
One Shot, LLC, 219-949-1684
Lightly scuff sand with gray Scotch Brite pad and wipe down with Isopropyl Alcohol 5005 Acrylic Bonding Primer White 1 SHOT® Lettering Enamels, CHROMATIC Bulletin Colors
PPG Industries, 800-441-9695
Lightly scuff sand and remove all forms of contamination, clean with solvent PPG Duracryl® Acrylic Lacquer
T.J. Ronan Paint Corp., 800-247-6626 or 718-292-1100
wipe with isopropyl alcohol (91%) Metro Vinyl Primer (water borne), Universal Primer, Sticktite White Primer Bulletin Color, Lettering Enamel, Aquacote® (water borne)
Sherwin-Williams, 700-331-7979
DTM Bonding Primer DTM Acrylic Coating METALATEX semi-gloss coating
Cleaning per SSPC-SP1 (Solvent cleaning) Bond-Plex® water based acrylic coating
Spraylat Corp., 800-336-1936 or 914-699-3035
Must be sanded or primed Series 20/30 Wash Primer Series 20 Acrylic Lacquer
Series 30 Polyurethane
Scuff sand using Scotch Brite pad Polycryl