About Conformal Coating

We use the following types of conformal coating at ProCOAT. Understanding the general characteristics of the common types used in the industry will allow you to make the best choice for your application. Standards used by the industry are IPC-CC-830, Mil-I-46058C, Mil-P-28809 and UL746C.

We are proud to use Humiseal, Dextor Hysol, and Miller-Stephenson products.

Acrylic (Type AR)

The common characteristics of acrylic-type coating include:

• It dries at room temperature in minutes

• It has desirable electrical and physical properties

• It is fungus resistant

• It has a long pot life

• It also has a low or no exotherm during cure, which prevents damage to heat-sensitive components

• It is easy to remove

• Dielectric withstands > 1500 volts

• Its temperature range is –59°C to 132°C

Polyurethane (Type UR)

The common characteristics of polyurethane-type coating include:

• It is available in one-part, two-part, UV-curable and water-borne systems

• It provides excellent humidity and chemical resistance, with outstanding dielectric properties for extended periods

• It is difficult to apply and remove

• Rework can be completed on small areas by burning through the coating with a soldering iron

• It requires extended curing time, or baking in a recirculating oven

• Its temperature range is –59°C to 132°C

Silicone (Type SR)

The common characteristics of silicone-type coating include:

• It is useful for high-temperature requirements, typically to 200°C

• It provides high humidity and corrosion resistance, with good thermal endurance for high heat-dissipating components

• It is susceptible to abrasion and has a high coefficient of thermal expansion

• It is available in 100% solids heat-curing liquids, 100% solids moisture-curing liquids, 100% solids UV-curable liquids, and solvent-borne reactive coating

• Rework can be completed when chemical strippers are used for coating removal

• Its temperature range is –65°C to 200°C