Parker Lord CoolTherm® SC-309 is a two component, thermally conductive silicone encapsulant that is used for electrical/electronic encapsulating applications. It provides low stress on components, environmental resistance, and excellent flame retardancy. Hardener, 1 gal Pail.
| Typical Use: | Used for electrical/electronic encapsulating applications. | 
| Brand: | CoolTherm | 
| Chemical Composition: | Silicone | 
| Color: | Resin: Gray; Hardener: White; Mixed: Light Gray | 
| Components: | 2 part | 
| Cure System: | Room Temperature/Heat | 
| Cure Time: | 24h @ room temperature; 60min @ 100 °C; 10min @ 120 °C | 
| Dielectric Strength: | 23.6 kV/mm | 
| Flash Point: | 93 °C | 
| Hardness: | 34 A | 
| Key Specifications: | UL 94 V-0 | 
| Mix Ratio: | 1:1 | 
| Specific Gravity: | 1.67 | 
| Tensile Strength: | 50 psi | 
| Thermal Conductivity: | 0.9 W/mK | 
| Viscosity: | Resin: 3,500; Hardener: 3,500; Mixed: 3,600 | 
| Volume Resistivity: | 4.3 x 10^13 | 
| Working Time: | 30min @ 25 °C |