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Overcoat Pens

MG Chemicals’ Overcoat Pens are easy to use conformal coating acrylic 1-part resin systems for circuit board repair. They are fast drying and provide an excellent finish in multiple colors. They are ideal when you need to repair or rework damaged coated areas, or protect electronic circuits against moisture, dirt, dust, thermal shocks, scratches and other environmental hazards that could corrode or otherwise damage the electronic components. They also insulate against arcing, shorts, and static discharges.

 

419D – Fast-drying acrylic resin available in a variety of colors:

Technical Documents

Conformal Coating Catalogue


I’m having trouble priming the pen

First shake the pen back and forth, listening for the ball bearing to remix the pen contents. Next, firmly press the pen tip on a hard surface, squeeze the side of the pen and slowly drag the tip back and forth over the surface much like trying to get ink to flow from a regular pen. Once coating dispenses, it should come out more easily with some light pressure.

What is the chemical resistance of acrylics?

Acrylic materials hold up well to moisture and most aqueous chemicals like acids and bases. They do not hold up against chemical solvents like alcohols or acetones and are not generally recommended for applications in harsher environments.

How can I measure dry film thickness?

There are different tools available to measure the dry film thickness. The easiest is the micrometer where the applicator can simply measure substrate thickness before and after coating with the difference being the dry film thickness. If the underlying substrate is electrically conductive, you can use a Positector which is a non-destructive test method.

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