How to Repaste a Laptop
Replacing dried-out thermal paste is the single most effective fix for a hot, noisy laptop. Here is how to do it correctly.
Signs your laptop needs repasting
Temps higher than your baseline
Gaming laptops routinely reach 85-95°C under full load by design. The sign to watch is regression: if it used to run at 80°C and now hits 95°C+ on the same workload, the paste has degraded.
Fan at full speed during light tasks
Browsing or video playback should not trigger max fan speed. If it does, thermal paste is likely the cause.
Sudden thermal throttling
The system drops clock speeds to protect itself from heat. This directly reduces performance in games and creative work.
It has been 4+ years
Most thermal pastes dry out within 3–6 years in a laptop environment. High operating temperatures accelerate degradation.
Before you open: check if your laptop uses factory liquid metal
Some high-end laptops (certain ASUS ROG, Lenovo Legion, and MSI models) use liquid metal applied from the factory. If you find a silver, mirror-like compound on the die rather than a grey paste, do not replace it with standard paste. Replacing liquid metal with paste will result in higher, not lower, temperatures. Look up your specific model before proceeding.
Step-by-step guide
Check your temperatures first
Run a stress test (Cinebench, Prime95, or FurMark) and monitor CPU and GPU temperatures using HWiNFO64 or HWMonitor. If peak temperatures stay below 85°C, repasting may not be necessary yet. Record the numbers as a baseline regardless.
Find your model's teardown
Search for your exact laptop model on iFixit or YouTube. Note how many screws are hidden under rubber feet or labels, whether any are different lengths, and the order for removing the heatsink. Skipping this step is the most common cause of broken clips and stripped screws.
Open the bottom panel
Remove all screws. Use a plastic spudger at a rear corner to start separating the panel. Never use a knife or metal tool along the seam. Work your way around the perimeter. Some panels click out; others slide slightly before lifting. Forced panels almost always break a clip.
Disconnect the battery
Find the battery connector (usually a flat ribbon or a plug near the battery pack) and pull it straight out. Do this before touching any other component. Laptop boards carry voltage as long as the battery is connected, even unplugged from mains.
Remove the heatsink
Find the mounting screws on the heatsink. They are usually numbered for removal order (start at the highest number). Remove them in reverse sequence: this releases pressure evenly and prevents die cracking. Lift the heatsink straight up; if it sticks slightly, twist gently in place before lifting. Do not pry from one side.
Clean both surfaces
Apply Fusion Cleaner to the old compound on the die and heatsink base. Let it sit for 15–20 seconds, then wipe off with a lint-free cloth. Use straight strokes. Repeat with a fresh wipe until the surface is uniformly matte with no sheen. Laptop CPU and GPU dies are exposed silicon. Handle with care and avoid touching the die surface with fingers.
Apply thermal paste
Use a very small dot: about 1.5–2 mm diameter for a laptop CPU die. Less is more: laptop heatsinks apply less pressure than desktop coolers, and too much paste will overflow onto the PCB rather than spreading correctly. For the GPU die, use the same approach: a small centered dot, or a thin line across the die if it is significantly wider than it is tall.
Replace thermal pads if needed
Inspect the thermal pads on any secondary chips contacted by the heatsink (VRAM, VRM, power delivery components). Dried, cracked, or crumbling pads should be replaced. Measure the gap or look up the original spec. Using a pad that is 0.5 mm too thin will leave a component without contact; slightly too thick compresses correctly under pressure.
Reassemble and verify
Remount the heatsink in the numbered screw order (start at 1, go in sequence). Tighten each screw a quarter-turn at a time, alternating, to distribute pressure evenly. Reconnect the battery, close the panel, replace all screws. Boot and immediately run the same stress test. A successful repaste drops peak temperatures by 10–25°C on most laptops.
Which products do I need?
For most laptop repastes you need thermal paste. If the heatsink also contacts VRAM or VRM chips, add thermal pads.
Recommended
Fusion Ultra Paste
8.5 W/mK. Excellent performance for laptop repastes. Non-conductive, stable for 5+ years at laptop operating temperatures.
Maximum performance
Fusion Supreme Paste
12.8 W/mK. Best-in-class conductivity for thin-and-light laptops where every degree matters.
If replacing pads too
Thermal Pads
0.5–2.5 mm thickness range. Check your model's service manual for the correct gap dimension on each chip.
Essential
Fusion Cleaner Kit
99% IPA formulation with lint-free wipes. Removes old compound cleanly without residue.