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DOWSIL DC 567 Silicone Encapsulant for PCB Potting and Electronics Protection
DOWSIL DC 567 Silicone Encapsulant for PCB Potting Protection
DOWSIL DC 567 Silicone Encapsulant is a two-part, black silicone material developed for potting and protecting printed circuit board assemblies, battery-pack electronics, sensors, connectors, control modules, and other sensitive electrical components. Dow’s current official product listing identifies the material as SYLGARD 567 Primerless Silicone Encapsulant Kit. Its convenient 1:1 mixing ratio simplifies meter-mix dispensing and manual preparation, helping manufacturers maintain consistent processing during electronic encapsulation.
After heat curing, DOWSIL DC 567 Silicone Encapsulant forms a firm yet resilient elastomer that provides mechanical protection, electrical insulation, environmental protection, and stress relief. The black, opaque appearance covers internal circuitry and can help operators visually confirm complete filling. Its medium-viscosity flow allows the mixed material to move around components and into controlled spaces without behaving like an extremely thin liquid, making it useful for PCB systems with varied component heights and complex geometries.
Key Benefits of DOWSIL DC 567 Silicone Encapsulant
DOWSIL DC 567 Silicone Encapsulant combines primerless adhesion with convenient two-component processing. Dow lists a typical mixed viscosity of approximately 1,480 mPa·s, a specific gravity of about 1.24, and a cured hardness of approximately 40 Shore A. This balance creates a firm encapsulated structure that can support components while remaining more flexible than many rigid epoxy potting compounds.
The product is designed for heat-accelerated curing. Published reference schedules include approximately 180 minutes at 70°C or 120 minutes at 100°C. Its working time at 25°C is listed as more than 4,320 minutes, providing a long processing window for large assemblies, controlled filling, de-airing, and production interruptions. Actual curing and handling performance can vary with batch size, oven accuracy, part temperature, geometry, and thermal mass.
Applications for DOWSIL DC 567 Silicone Encapsulant
DOWSIL DC 567 Silicone Encapsulant is intended for printed circuit boards, battery-pack modules, electronic components, control units, connectors, sensors, power assemblies, and other systems requiring durable potting protection. The cured silicone helps reduce stress on delicate parts during vibration, impact, and temperature cycling. It also creates a protective barrier that can help isolate circuitry from moisture, contamination, and environmental exposure when the complete assembly and process have been properly validated.
Dow lists a typical dielectric strength of approximately 405 volts per mil and thermal conductivity of about 0.29 W/m·K. The product is UL Recognized and carries a UL 94 V-0 flammability classification, making it attractive for electronics programs requiring documented flame resistance. These figures are typical values rather than guaranteed design specifications, so manufacturers should confirm the electrical, thermal, adhesion, and flammability requirements of each finished application.
How to Apply DOWSIL DC 567 Silicone Encapsulant
Before using DOWSIL DC 567 Silicone Encapsulant, clean and dry the components, housings, and circuit boards. Remove dust, moisture, oils, flux residues, release agents, and other contamination that could interfere with adhesion or curing. Condition both components to the selected processing temperature, then combine Part A and Part B at a 1:1 ratio using suitable dispensing equipment or an accurately controlled manual process.
Mix thoroughly while minimizing air entrapment. Vacuum de-airing may be useful when bubbles could affect electrical insulation, appearance, or component coverage. Dispense the mixed silicone into the assembly and allow it to flow around all required areas. Cure using a validated heat schedule and avoid moving, testing, or loading the assembly until sufficient cure has been achieved.
Storage and Safety of DOWSIL DC 567 Silicone Encapsulant
Store DOWSIL DC 567 Silicone Encapsulant in its original sealed containers under the conditions shown on the current product label and technical documentation. Keep Part A and Part B dispensing tools clean and separate to prevent contamination. Use appropriate ventilation and personal protective equipment, and review the latest safety data sheets before handling.
For electronics manufacturers seeking a black, flame-retardant, primerless potting material, DOWSIL DC 567 Silicone Encapsulant provides convenient 1:1 mixing, long working time, controlled flow, electrical insulation, and durable component protection. Explore our electronic silicone encapsulants for additional products designed for circuit boards, battery systems, sensors, connectors, and industrial control assemblies.
