MG Chemicals Conformal Coating - Formula 422C

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  • $29.99
  • Regular price $34.99
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US shipping Only - Hazmat

This is the conformal coating that I have used to protect my drones for 5 years. My quads end up in the water nearly every week...and we flew through a bando in the rain yesterday...Weather you end up hitting a droplet of dew on a blade of grass or you sink your quad in the Abyss, Conformal Coating is the way to protect your electronics from water damage.



MG Chemicals is great for every board on your quad, but dont paint it in buttons, switches, or connectors that you plan to use. It's a light duty coating, which makes it easy to rework through it, just solder and go without needing to remove the coating to repair your quads.


Updated to 422C as 422B is discontinued

No Rain - Flying with Conformal Coating


How to apply Conformal Coating with IllinVillainFPV


SKU# 422C-55ML
MFR# 422C-55ML

  • Certified UL94 V-0 (File# E203094)
  • Maximum service temperature of 200 °C
  • Fast cure – tack free in about 10 min; dries in 20 min at 65 °C [149 °F]
  • Fluoresces under UV-A light
  • Validated for selective robotic coating equipment
  • Corrosion resistant



    422C is a 1-part, acrylic-silicone blend waterproof conformal coating that cures to a durable, flexible and smooth finish. It is easy to apply and can be handled in only 10 minutes. It may be removed with appropriate strippers, or soldered through for repair or rework.

    This circuit coating puts minimum stress on components during thermal cycling, making it ideal for applications that involve a wide temperature range. It provides strong protection against moisture, corrosion, fungus, dirt, dust, thermal shock, short circuits, high-voltage arcing, and static discharge.

    This circuit board waterproof coating is the best conformal coating where moisture protection, wide range service temperature, and flexibility are required. It works great as a first-person view (fpv) conformal coating and is an excellent choice for waterproofing remote systems, such as drones and remote-control cars.

    Cured Properties
    • Resistivity: 3.5 x 1013 Ω·cm
    • Dielectric Strength: 1 076 V/mil
    • Dielectric Withstand Voltage: >1 500 V
    • Glass Transition Temperature (Tg): 31 °C
    • CTE prior Tg: 111 ppm/°C
    • Service Temperature Range: -40–200 °C
    Usage Parameters
    • Dry Time To Handle (1 coat): 10 min
    • Dry Time To Handle (2 coats): 15 min
    • Minimum Recoat Time: 2 min
    • Recommended Film Thickness: 25–75 µm
    • Theoretical Coverage @ 25 µm: 58 900 cm2/L
    Uncured Properties
    • Viscosity @ 25 ˚C: 14 cP
    • Density: 0.92 g/mL
    • Percent Solids: 30 %
    • Shelf Life: 5 years
    • Calculated VOC: 271 g/L