Zalman ZM-STC7 thermal paste 10-pack 4 g 7.2 W/m·K 220 Pa.s

Zalman STC7 10-pack thermal paste

This pack contains ten 4 g syringes of Zalman STC7 thermal compound designed for CPU and GPU applications. The grey paste uses silicone oil with alumina, aluminium and zinc oxide fillers to achieve a thermal conductivity of 7.2 W/m·K. It is electrically non-conductive and RoHS compliant, making it suitable for system builders and upgraders who need multiple applications.

Practical limits of 7.2 W/m·K conductivity

At 7.2 W/m·K the compound sits in the mid-range for silicone-based pastes, so it handles typical desktop CPUs and mainstream graphics cards but may not extract maximum heat from heavily overclocked or high-wattage parts. The 220 Pa·s viscosity keeps the paste stable under clamping pressure without excessive pump-out, yet it is thick enough that very tight clearances or direct-die mounting without a shim can be harder to spread evenly. Buyers who need higher conductivity for extreme overclocking or dense server chips should look elsewhere.

Syringe design eases installation and storage

Each 117.4 x 21.2 x 15 mm syringe has graduation marks for visual dosing and a rubber cap that prevents the 4 g contents from drying between uses. The plunger action lets you deposit a precise line or dot, reducing the risk of air bubbles or excess paste spilling onto the socket. The only common issue is applying too much material; a pea-sized amount is usually sufficient, and the graduations help avoid waste.