Protection for delicate electronics. Dow SYLGARD 527 Silicone Dielectric Gel is a two-part silicone gel used for encapsulating, potting, and sealing electronic devices. It provides flexibility, good flow, and low viscosity at a 1:1 mix ratio, allowing it to flow readily under and around components to protect delicate PCB system assemblies.
Gel characteristics. Gels are a special class of encapsulant that cure to an extremely soft material. SYLGARD 527 is a low-viscosity, very soft gel suitable for delicate components; it retains much of the stress relief and self-healing character of a liquid while providing the dimensional stability of an elastomer. This makes it well suited to isolating circuits from moisture and other contaminants and providing electrical insulation for high voltages.
Processing flexibility. As a two-part gel, it offers processing flexibility with the option of room-temperature cure without ovens, or heat-accelerated cure when faster processing is needed. Its self-healing quality means the cured gel can reflow around probes or leads and reseal, which is valuable in serviceable or test-point assemblies.
Electrical performance. Dow's technical data lists dielectric properties supporting its insulating role, including a dielectric constant of about 2.85 at 100 kHz and high volume resistivity on the order of 10^15 ohm-cm. These properties underline its use as a dielectric gel for sensitive, high-voltage, and delicate electronic assemblies. Consult the datasheet for the full property set.
Recommended For
Encapsulating, potting, and sealing electronic devices
Protecting delicate PCB system assemblies
Isolating circuits from moisture and contaminants
Electrical insulation for high voltages
Serviceable assemblies benefiting from a self-healing gel
Available Variants
527 SIL DIELECT GEL .9KG — 0.9 kg kit
527 SIL DIELECT GEL 7.2KG — 7.2 kg kit
527 SIL DIELECT GEL 36.3KG — 36.3 kg kit
All three variants are the same clear SYLGARD 527 two-part dielectric gel and differ only in kit size, from the 0.9 kg kit for small-scale or prototype work up to the 36.3 kg kit for higher-volume production potting.
Product Details
Product type: Two-part silicone dielectric gel
Color: Clear
Mix ratio: 1:1
Viscosity: Low viscosity; very soft when cured
Cure: Room temperature or heat-accelerated
Dielectric constant: ~2.85 at 100 kHz
Volume resistivity: ~2.75 x 10^15 ohm-cm
Container sizes: 0.9 kg, 7.2 kg, and 36.3 kg kits
Primary Industries
Electronics and PCB manufacturing
Automotive electronics
Telecommunications
High-voltage and power electronics
Standards and Certifications
None specified by source
FAQs
What is a dielectric gel used for?
A dielectric gel encapsulates, pots, and seals electronic devices while providing electrical insulation. SYLGARD 527 flows under and around components thanks to its low viscosity, then cures to an extremely soft material that isolates circuits from moisture and contaminants and insulates against high voltages, all while cushioning delicate parts.
Why choose a soft gel instead of a firm encapsulant?
Gels cure extremely soft and retain much of the stress relief and self-healing character of a liquid, while still offering the dimensional stability of an elastomer. That combination protects delicate components from mechanical and thermal stress and lets the gel reflow and reseal around probes or leads in serviceable assemblies.
How is SYLGARD 527 mixed and cured?
It uses a straightforward 1:1 mix ratio and can cure at room temperature with no ovens required, or with heat acceleration when faster processing is preferred. Its low viscosity supports good flow under components during potting. Consult the datasheet for gel and full-cure times at your chosen temperature.
What are its electrical properties?
Dow's technical data lists dielectric properties consistent with an insulating gel, including a dielectric constant of about 2.85 at 100 kHz and very high volume resistivity on the order of 10^15 ohm-cm. These support its use for high-voltage insulation. Review the full datasheet for the complete property set.
Which kit size should I choose?
All three kits contain the same clear two-part gel with identical properties, so the choice depends only on volume. The 0.9 kg kit suits small-scale, prototype, or repair work, the 7.2 kg kit fits mid-volume production, and the 36.3 kg kit is aimed at higher-volume potting operations.
