Therma Paste Premium Performance ARCTIC MX-4 Premium Performance Density of Thermal Paste 2.50 g/cm³ The viscosity is 31.600 poise. Constant Use Between -50 and 150 °C Click Here for Additional Information. ARCTIC MX-4 PREMIUM PERFORMANCE THERMAL PASTE: Ideal Uniformity for All Uses A thicker or thinner thermal compound may be preferred, depending on the application and personal preference. Long-term performance is guaranteed by exceptional non-drying and non-bleeding qualities. You can find the ideal viscosity for your application with ARCTIC thermal pastes. Simple Use Even for novices, MX-4 is simple to use because of its consistency. The application method to prevent air pockets between processors and coolers is shown in the video below. Safe Use ARCTIC's MX-4 is metal-free and not electrically conductive, unlike pastes made of metal oxides or liquid metal.