Heatsink, Pad, 17.27 x 14.22 x 0.23mm

Aavid Thermalloy In-Sil-8 series thermal interface pads provide thermal conductance and electrical isolation in one package. In-Sil-8 pads are silicone-based insulators that come with thermally conductive fillers to isolate up to 6000 volts AC.
In-Sil-8 pads withstand the rigors of assembly, harsh environments, and aging under continuous use. The In-Sil-8 pads are designed for quick and easy installation, that is 4 times faster than mica and grease, and they won't contaminate solder baths.

Available in a range of package sizes
Won't contaminate solder baths
Can withstand environmental changes without changing Its properties
Dielectric constant 100 Hz (ASTM D 1450): 5.5