MG Chemicals 422B-55ML 422B Silicone Modified Conformal Coating
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422B is a 1-part, acrylic-silicone blend 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.
422B is designed for applications where both high service temperature and flexibility are required. It 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.
Cured Properties
- Resistivity: 1.2 x 1015 Ω·cm
- Dielectric Strength: 1 056 V/mil
- Dielectric Withstand Voltage: >1 500 V
- Dielectric Constant @ 1 MHz: 1.99
- Dissipation Factor @ 1 MHz: 0.012
- Glass Transition Temperature (Tg): 29 °C
- CTE prior Tg: 275 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 Re-coat Time: 3 min
- Recommended Film Thickness: 25–75 µm
- Theoretical Coverage @ 25 µm: 70 000 cm2/L
Uncured Properties
- Viscosity @ 25 ˚C: 10 cP
- Density: 0.90g/mL
- Percent Solids: 28 %
- Shelf Life: 5 y
- Calculated VOC: 289 g/L
Material Safety Data Sheet (MSDS)