Conformal Coating is a thin layer of a chemical compound (e.g., polymer) that is applied to electronic circuit boards (PCBAs) and other electronic components to protect them from moisture, dust, and chemicals, forming an electrically insulating barrier as well.

The main functions of Conformal Coating are as follows:

• Moisture protection: prevents moisture from reaching and damaging sensitive electronic components
• Corrosion protection: can help prevent corrosion caused by salt spray, chemicals and other contaminants, and electrochemical phenomena
• Dust and dirt protection: can help prevent the accumulation of dust and dirt on electronic components, which can lead to overheating and other problems
• Improved thermal management: can help improve thermal management by dissipating heat
• Improved reliability: by protecting electronic components from the environment, it can help improve the overall reliability of electronic devices.

There are different types of Conformal Coating, and the choice of one product over another is determined by the type of application, environmental conditions, and cost.

The different types of Conformal Coating are as follows:

• Acrylics: most widely used for versatility, ease of application and cost – AVR80 BA
• Polyurethanes: good chemical resistance, flexibility and ease of application
• Siliconics: products with good chemical resistance, wide temperature range (-40°; +200°C)
• Epoxies: good resistance to mechanical abrasion
• UV acrylics: flexible and fast-drying – ABCHIMIE836 UV LED
• Fluoro acrylates: high chemical resistance and ease of application – PROMOSOLV™ COAT UT10-UV; 3M™ NOVEC™ 1700
• Thermo-conductive.