Conformal Coatings

A conformal coating is a thin, protective coating for PCBs (circuit board) and other electronic components providing a polyurethane (urethane) / silicone protection from environmental conditions

The coating can be removed easily with most common solvents plus you can use a specialist solvent to remove and rework a conformal coating.

Why use a Conformal Coating?

  • A conformal coating conforms to the shape of the circuit board, PCB and its components.
  • Performance of PCBs can deteriorate because of moisture, sea salt, chemicals and temperature extremes using a conformal coating helps extend their working life.
  • Use the coating to protect PCBs to allow for higher voltage gradients and closer track spacing.
  • When using a conformal coating the viscosity and thickness of the coating is important as it can affect PCB performance. Viscosity of the conformal coating must be monitored as part of the process.

How to use Conformal Coatings.

  • Brushing the components with the coating material is suitable for low volume applications and for finishing and repair.
  • Spraying on the coating can be done by using an aerosol or dedicated spray booth. These methods are suitable for low and medium volume processing. They are more cost effective and provide excellent tip coverage to the components.
  • Dipping parts into a conformal coating is used for high volume applications. Masking is important in the coating process plus must be perfect to protect the PCB circuit board when using this coating process.
  • You can rework a component after a conformal coating is applied.

Types of Conformal Coating.

  • Silicone coatings give great protection in a range of temperatures, good chemical resistance, flexibility and resistant to sea salt.
  • Acrylic coatings, easy to use and remove, provide fair elasticity, abrasion resistant and have high dielectric strength.
  • Polyurethane / urethane coatings have excellent moisture and chemical resistance and are abrasion-resistant
  • Epoxy coatings give good humidity resistance, high abrasion and chemical resistance

Where to use a Conformal Coating.

Conformal Coatings are used in many types of applications where high performance and reliability are needed.

  • These include military, car, marine and green energy to domestic and mobile electronic industries.

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Description Price Package Size Package Type Application Material Colour Maximum Operating Temperature Minimum Operating Temperature Trade Name
RS Stock No. 714-462
BrandRS PRO
HK$116.62
Each
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200 ml Aerosol PCBs Acrylic Resin Transparent +130°C -55°C -
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Mfr. Part No.DCA200H
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200 ml Aerosol PCBs Silicone Resin Transparent +200°C -70°C DCA
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BrandRS PRO
HK$124.44
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200 ml Aerosol PCBs Silicone Resin Red +200°C -70°C -
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Mfr. Part No.PUC400
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400 ml Aerosol Electronics PUR Transparent Amber +130°C -55°C PUC
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Mfr. Part No.4223F-1L
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1 L Can Electrical, Electronic Components Urethane Transparent Amber +155°C -40°C 4223F
RS Stock No. 918-5030
Mfr. Part No.419D-1L
HK$517.28
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1 L Can Aerospace, Automobile, Aviation, Communication, Consumer Electronics Industries, Electrical, Electronic Components, Industrial, Instrumentation, Marine Acrylic Clear +125°C -65°C 419D
RS Stock No. 918-5056
Mfr. Part No.4354-1L
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1 L Can Electronics Acrylic, Urethane Clear - - 4354 THINNER 4
RS Stock No. 918-5052
Mfr. Part No.4352-1L
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1 L Can Electronics Acrylic, Alkyd, Cellulose Acetate Butyrate, Epoxy, Nitrocellulose, Polyester Resin Clear - - 4352 THINNER 2
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5 L Bottle Dipping, Electronic Circuit, Spraying Water Based White +125°C -60°C WBP
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4.9 g Pen PCBs Acrylic Green +125°C -55°C CW3300
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1 L Can PCBs Silicone Clear +200°C -40°C 422B
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400 ml Aerosol Aerospace, Data Communications, Instrumentation Silicone Straw +200°C -65°C Konform
RS Stock No. 192-7559
Mfr. Part No.419E-1L
HK$457.03
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945 ml Can PCBs Acrylic Clear +130°C -65°C -
RS Stock No. 146-2871
Mfr. Part No.419D-340G
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410 ml Aerosol Automobile, Aviation, Cell Phones & Computer Tablets Components, Electric Generators, LED Boards, Motors, PCBs, Relays, Transformers Acrylic Clear +125°C -65°C 419D
RS Stock No. 494-714
BrandRS PRO
HK$133.51
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200 ml Aerosol PCBs Silicone Resin Transparent +200°C -70°C -
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Mfr. Part No.ERDCEO.75L
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1 L Bottle PCBs Thixotropic Gel Transparent - - CCRG
RS Stock No. 918-5059
Mfr. Part No.4351-1L
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1 L Can Dilute EMI/RFI Shielding Coatings - Clear - - 4351 THINNER
RS Stock No. 192-7558
Mfr. Part No.419E-340G
HK$271.13
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420 ml Aerosol PCBs Acrylic Clear +130°C -65°C -