Conformal Coatings

A conformal coating is a thin, protective coating for PCBs and other electronic components providing insulation and protection from external and environmental conditions. Available in a variety of formulas, the most common conformal coatings are made from acrylic, epoxy, silicone or urethane. The coating can be removed easily with most common solvents, or specialist solvents can be used to remove and rework a conformal coating. At RS Components, our range features products from industry-leading brands such as Ambersil, Chemtronics, Electrolube, MG Chemicals and RS PRO.

Why use a conformal coating?

A conformal coating provides protection from external conditions and contaminants, such as moisture, sea salt, chemicals and extreme temperatures. This protection extends the working life of the PCB, as well as allowing for higher voltages and closer track spacing on the PCB.

Conformal coatings are used in many types of applications where high performance and reliability are needed. These include military, automotive, marine and green energy to domestic and mobile electronic industries.

How are conformal coatings applied?

Conforming coatings are applied in low volume applications by brushing the components with the coating material. For low to medium volume applications, the coating can be sprayed onto the PCB using an aerosol or dedicated spray booth, providing excellent tip coverage to the components. High volume applications often use a dipping method. Masking is an important part of this coating process and must be applied perfectly to protect the PCB circuit board when using this coating process. A component can be reworked after a conformal coating is applied.

When using a conformal coating, the viscosity and thickness of the coating is highly important as it can affect PCB performance. Viscosity of the conformal coating must be monitored as part of the process.

What are the different 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.

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Description Price Package Size Package Type Application Material Colour Maximum Operating Temperature Minimum Operating Temperature Trade Name
RS stock no. 494-714
BrandRS PRO
R 300.59
Each
units
200 ml Aerosol PCBs Silicone Resin Transparent +200°C -70°C -
RS stock no. 405-159
Mfr. Part No.30799-AH
R 521.41
Each
units
400 ml Aerosol PCBs Acrylic Resin Transparent +60°C -40°C PLASTIK 70
RS stock no. 101-6343
Mfr. Part No.DCA200H
R 397.78
Each
units
200 ml Aerosol PCBs Silicone Resin Transparent +200°C -70°C DCA
RS stock no. 848-9098
Mfr. Part No.AFA200
R 265.72
Each
units
200 ml Aerosol Electrical Circuit Protection Acrylic Transparent +125°C -65°C AFA
RS stock no. 535-525
Mfr. Part No.FSC15ML
R 98.33
Each
units
15 ml Bottle Solvent Thinner Silicone Resin Transparent +125°C -50°C FSC
RS stock no. 918-5034
Mfr. Part No.422B-1L
R 2,605.35
Each
units
1 L Tin PCBs Silicone Clear +200°C -40°C 422B
RS stock no. 907-5592
Mfr. Part No.DCT05L
R 3,297.85
Each
units
5 L Can Protect Printed Circuit Boards - Colourless - - DCT
RS stock no. 918-5040
Mfr. Part No.435-1L
R 427.77
Each
units
1 L Tin Conformal Coating, Spray For EMI/RFI Shielding - Clear - - 435 THINNER
RS stock no. 918-5056
Mfr. Part No.4354-1L
R 614.76
Each
units
1 L Tin Electronics Acrylic, Urethane Clear - - 4354 THINNER 4
RS stock no. 557-991
Mfr. Part No.30235-AB
BrandAmbersil
R 383.55
Each
units
400 ml Aerosol Electronics, PCBs Acrylic Resin Transparent +60°C -40°C ACRYLIC
RS stock no. 251-3615
BrandRS PRO
R 101.12
Each (In a Pack of 5)
units
12 ml Pen Electronics, Office Equipment - Yellow +100°C -50°C -
RS stock no. 918-5052
Mfr. Part No.4352-1L
R 434.13
Each
units
1 L Tin Electronics Acrylic, Alkyd, Cellulose Acetate Butyrate, Epoxy, Nitrocellulose, Polyester Resin Clear - - 4352 THINNER 2
RS stock no. 124-7695
Mfr. Part No.422B-340g
R 570.37
Each
units
425 ml Bottle Aerospace, Air Bag Controllers, Automobile, Aviation, Communication, Consumer Electronics Industries, Electric Generators, Industrial Control Equipment, Instrumentation, Marine, Motors, Relays, Transformers Silicone Clear +200°C -40°C 422B
RS stock no. 831-141
BrandRS PRO
R 298.93
Each
units
200 ml Aerosol PCBs Silicone Resin Red +200°C -70°C -
RS stock no. 918-5030
Mfr. Part No.419D-1L
R 814.18
Each
units
1 L Tin Aerospace, Automobile, Aviation, Communication, Consumer Electronics Industries, Electrical, Electronic Components, Industrial, Instrumentation, Marine Acrylic Clear +125°C -65°C 419D
RS stock no. 918-5059
Mfr. Part No.4351-1L
R 572.23
Each
units
1 L Tin Dilute EMI/RFI Shielding Coatings - Clear - - 4351 THINNER
RS stock no. 907-5595
Mfr. Part No.FSC05L
R 6,584.26
Each
units
5 L Can PCBs Silicone Resin Transparent +125°C -50°C FSC
RS stock no. 763-0768
Mfr. Part No.SC3001RP250G
R 548.94
Each
units
250 g Pouch Electronics, Optics, PCBs Silicone Resin Transparent +200°C -60°C SC3001
RS stock no. 283-268
Mfr. Part No.LFCC400ML
R 705.29
Each
units
400 ml Aerosol PCBs Silicone Resin Transparent +150°C -50°C LFCC
RS stock no. 495-240
Mfr. Part No.CW3300G
R 503.58
Each
units
4.9 g Pen PCBs Acrylic Green +125°C -55°C CW3300