3M™ Paint Primer Concentrate HC-913

Recommended uses are as primer for galvanized metal, aluminum and plastic substrates.

3M™ HC-913 Paint Primer Concentrate (PDF, 90 Kb) generally works as a primer for paints in which the HC-913 resin is insoluble, such as latex paints and those whose solvent is of the mineral spirits type. This concentrate is a thermo-plastic resin which is permanently tacky, so it needs no cure time and is ready for overcoating as soon as the solvent evaporates.

HC-913 concentrate is usually diluted to brushable or sprayable consistency (3—6% non-volatile) with a solvent mixture whose wetting, evaporation, and substrate interaction properties are suitable for the intended substrate. Since it is known that residual processing oil and mold release agent can leave a surface non-wettable by the coating, HC-913 concentrate may be compounded with a solvent which will help to displace these materials. Over plastics, it may be helpful to include a solvent which slightly softens the surface. A dye may be added to help the user determine completeness of coverage.