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The 422B Silicone Modified Conformal Coating is a clear and flexible coating that is ideal for protecting electronic circuits in high temperature environments or applications requiring extreme flexibility. It protects against moisture, dirt, dust, and other particulates, and thus avoids corrosion of electronic components. It also insulates against high-voltage arcing, shorts, and static discharges. As well, it protects against thermal shock and puts very little stress on components during temperature cycling.

Compared to other typical silicones, the 422B is a one-part, acrylated silicone which makes it is easier to apply, remove, and rework. Also, it has a faster cure time and a much longer shelf life. It is available in both aerosol, liquid, and pen form and may be applied by spraying, dipping, or brushing.

The 422B protective coating is UL certified under the Coatings for Use on Recognized Printed Wiring Boards - Component category. It performs as a 94V-0 non-flammable coating. It is intended as an easyto-use, cost-effective solution for protection against the typical risks PCB’s face in high temperature environments. It is not intended for high voltage applications (>1500 V) with extended exposures (days) to very high humidity (>95%) and temperature environments (>65 °C [149 °F]). Customers with such applications should inquire about our line of silicone conformal coatings from Momentive Performance Materials.

Applications & Usages

The 422B improves reliability and lengthens the life of electronic circuitry. Its primary applications are in the automobile, marine, aerospace, aviation, communication, instrumentation, and industrial control equipment industries that involve high temperatures.

 

Features Applications
  • Certified UL 94V-0 (File # E203094)
  • Maximum constant service temperature of 200 °C
  • Fast cure- tack free in 7 min at room temperature, drying time in 20 min at 65 °C
  • Protects electronics from moisture, corrosion, fungus, thermal shock, and static discharges
  • Easy to inspect: fluoresces blue at 437 nm ± 65 nm under UVA light
  • Extended shelf life avoids worries about premature hardening and wastage
  • Easy rework and repairs: Solders through the coat
  • Removable with Cat. No. 435 thinner or Cat. No. 8312 stripper
  • Printed Circuit boards
  • LED Boards
  • Electric generators, motors and transformers
  • Relays
  • High temperature environments
Catalog Number Sizes Available Description
422B-55ML 55 mL (1.8 fl oz) Liquid
422B-340G 425 mL (14 fl oz) Aerosol
422B-1L 945 mL (2 pt) Liquid
422B-4L 3.78 L (1 gal) Liquid
422B-20L 18.9 L (5 gal) Liquid
422B-P 5 mL (0.16 fl oz) Pen

Safety Data Sheet
Technical Data Sheet

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