Brand Sylgard Application Type Seal 1 Part or 2 Part 1 Part Material Form Gel Industry Circuits, E-Mobility Solutions, Smart Meters, Electronics, Optoelectronics Manufacturer Dow Chemistry Silicone, Solvent-free Cure Method Heat, Addition Cure Cure Temperature (°C) 20 to 25, 150 Cure Time (min) 60 Viscosity (cPs) Thixotropic, 2,925 Color Translucent High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Light Refractive Index (RI) High
Technical Data for Dow Sylgard 535 Thixotropic Dielectric Gel
- Sealant - Seal
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
- Dispenser - Automated dispensing equipment
- 2-Part Cure - Addition Cure
Cure Temperature (°C) 20 to 25, 150 Cure Time (min) 60 Viscosity (cPs) Thixotropic, 2,925
High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Moisture/Humidity Resistance Moisture/humidity resistance
Dielectric Strength (V/mil) Excellent, 279 Volume Resistivity (O) 6E+14 (ohms/cm)
Shore A Hardness 85 (grams) Flexibility Soft or firm, Flexible, Resilient
Light Refractive Index (RI) High Specific Gravity 0.970 Test Method
Shelf Life Details Storage conditions and shelf life (“Use By” date) are indicated on the product label. Shelf Life Temperature (°F) 41 Shelf Life (mon) 9
Best Practices for Dow Sylgard 535 Thixotropic Dielectric Gel
Some gels are supplied in bladder packs that avoid direct air contact with the liquid gel components, allowing use of air pressure over the pack in a pressure pot for dispensing . Do not apply air pressure directly to the liquid gel surface (without the bladder pack) as the gel can become supersaturated with air and bubbling can occur when the material is dispensed and cured. Use of bladder packs prevents bubbling, maintains cleanliness and avoids gel contamination. Gels can be dispensed manually or by using one of the available types of meter mix equipment. If possible, the potential for entrapment and incorporation of gas (typically air) should be considered during design of the part and selection of a process to dispense the gel. This is especially important with higher-viscosity and faster curing gels.
If a substrate or material is questionable with respect to potentially causing inhibition of cure, it is recommended that a small scale compatibility test be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure.
Comparable Materials for Dow Sylgard 535 Thixotropic Dielectric Gel
Spec Engine® Results
Questions about this material?
Get personal assistance with your specific application needs.