Master Bond MasterSil 773 is a ready-to-use one component ultra-low viscosity silicone elastomer based conformal coating which provides excellent protection to electronic circuitry in high humidity environments as well as upon exposure to shock and vibration. It cures quickly at ambient temperatures to a highly flexible, low hardness silicone elastomeric coating. Adhesion to critical board components is outstanding. MasterSil 773 is recommended over the exceptionally wide service temperature range of -65°C to +200°C. The MasterSil 773 silicone conformal coating can be applied by dipping, spraying, brushing, or flow coating using either manual or highly automatic coating techniques. These cured silicone conformal coatings are very easy to repair. No solvents are required for either application or repair procedures.

A most useful characteristic of this product is that it maintains its low modulus over the remarkably wide temperature range of -65°C to in excess of +200°C. This is ideal for application as a low stress coating affording optimal protection to sensitive board components in demanding environments. MasterSil 773 is 100% reactive and cures by the moisture mechanism. If needed, a UV tracer dye is also available with this system.