PK-2 Thermal Compound When putting down, nothing beats smooth and easy. That is why we created the PK-2 thermal compound. The PK-2 thermal compound is a high performance thermal bonding agent specially designed for easy application.PK-2's core feature is its low viscosity, allowing for one to quickly and easily apply the thinnest coat of thermal compound possible.This will get your components up close and personal in no time. Specific Gravity 2.5g/cm³ Adhesiveness 250000Cps Thermal Conductivity 10.2 W/m-℃ Thermal Impedance 0.015 ℃-in²/W