Ideal for high temperature environments. Silicone Conformal coating is a flexible finish product that provides a protective coating for printed circuit boards against moisture, corrosion, and thermal shock. It protects and insulates electrical and electronic components and assemblies, including generators, motors, transformers, relays, and solenoid coils. For spraying, liquid can be thinned using M.G. Thinner Cleaner. Thin up to one half part thinner to one part coating.

Directions of Use

Best results will be obtained by applying to thoroughly cleaned and dried parts or materials. It is essential that surfaces be free of any trace of grease or organic substances.

At room temperature, the product will tack free in approximately 5-7 minutes, and full cure will be achieved in approximately 48 hours.

Curing may be accelerated by applying moderate heat with either a convection oven or infrared lamps. We recommend curing in a convection oven at 65°C (149°F) for one hour, but other temperature and time combinations can work well. Heat curing will improve the physical strength of this coating.

Specifications

Standards     UL Recognized, 94V-0 (file # E203094) Uncured Properties Phase   Liquid Color   Clear Odor   Ethereal Specific Gravity   0.90 Viscosity   13 cps @ 23 °C Brookfield 100 rpm Spindle 4 Flash point   -18 °C / -0.4 ° F Autoignition temperature   465 °C / 869 °F LEL   0.8 UEL   13.1 Boiling Point   55 °C / 131 °F pH   7.0 Solvent   Xylene, acetone Percent solids by weight   25% (liquid);15% (aerosol) VOC Content   75.0 % by wt.  675 Grams / Liter Cure schedule Tack free time   5-7 minutes at 22°C / 71.6°F Full cure   48 hrs. @ 20°C / 68°F 20 min. @ 65°C / 149°F Electrical Properties Dielectric Strength IPC-TM-650    1056 volts/mil @ 0.150 inch thickness Dielectric Constant ASTM 150-98   @ 60MHz   2.35 @ 1 MHz   1.99 Dissipation Factor ASTM 150-98   @ 60MHz   0.037 @ 1 MHz   0.012 Volume Resistivity ASTM D257 1.2 X 1015 ohm · cm Surface Resistivity ASTM D257 4.5 X 1016 ohm · cm Thermal Properties Coefficient of Thermal Expansion (-40°C to 160°C) IPC-TM-650    253.3 ppm/°C Softening point   31.4 °C

Available Sizes

Catalog Number Sizes Available Description 422B-55ML 2 oz (55 mL) Liquid 422B-340G 340 gram (12 oz) Aerosol 422B-1L 950 mL (1 quart) Liquid 422B-4L 4 L (1 gallon) Liquid 422B-20L 20 L (5.3 gallon) Liquid 422B-P 5 mL (0.16 oz) Pen