Conductive Thermal Paste is an important part of a computer’s cooling system. This heatsink material is used by manufacturers to help dissipate heat and liquefy the air inside a computer’s processor. Thermal paste has many uses, including as an adhesive applied to a CPU or graphics card chip before it is attached to a printed circuit board (PCB) in order to enhance heat transfer. It can also be used in various other applications, such as in 3D printers to improve conductivity between the hotend and the bed of the printer (extruder).

Thermal paste comes in different types with varying characteristics. Here are some things that you should keep in mind when choosing which thermally conductive paste best suits your application.

Different Types of Thermal Paste

There are many types of thermal paste and they come in different colors, thicknesses, and brands. You should know the different types so that you can find the right one for your application.

Viscosity is the thickness of a liquid. One way to measure this is by measuring the time it takes for a drop of water to fall from a height onto a vertical surface. The higher the viscosity, the thicker the paste. Viscosity also affects how much heat paste can dissipate.

Some general properties include:

– High viscosity means more heat dissipation

– High temperature stability means less volatile components

– Low viscosity is more suited for situations where thermal paste needs to be thinned down, such as printing with 3D printers

– Lower temperature sensitivity means lower chance of damage if applied at too high or too low temperatures

What Makes a Good Thermal Paste

There are many different types of thermal paste on the market, with varying characteristics. It’s important to understand what differentiates one type from another before making a purchase decision.

The key factors that distinguish one type of thermal paste from another include:

– Density: The amount of material dispersed in a given unit volume is an important factor for determining the thermal conductivity. Some pastes have a high density, which increases their thermal properties and resistance to flow and heat transfer. Other pastes have a low density, which decreases their thermal properties but provides greater film strength.

– Compression set: This is the measure of how much force it takes to compress a layer of paste material into its original thickness (either by hand or through machinery). The higher the compression set, the more durable the paste is.

– Surface hardness: The harder your surface, the better your paste will adhere to it. Generally speaking, a harder surface can withstand higher temperatures without melting or falling off. A softer surface might require several applications for good adhesion due to reduced adherence on account of the softer nature and lower heat tolerance.

– Thermal stability: How stable your paste is at various temperatures can determine its durability and performance over

How to Apply the Paste

Before applying the paste, make sure that you are using the right type for your application. This can be done by checking the product’s packaging or manual for information about the paste’s use.

Once you’ve chosen a paste and made sure it’s the right type, you’ll need to get to work. Apply a small dab of paste on each corner of the heat sink and then spread it around so that a thin layer is applied. When applying too much paste, it is too difficult to remove without damaging the surface of your CPU or graphics card. If you’re uncertain how much is too much, test-apply a small amount of paste to a small portion of your heat sink before applying it all over in case you need to remove some excess later on.

When applying thermal paste, make sure that you only apply enough so that there is an even coating over both surfaces of your chip and heat sink alike and that there are no air pockets left uncovered between them. These air pockets will cause uneven heating (which can lead to worn-out components).

Once everything is applied and in place, let your computer sit for at least one hour (or as long as recommended) before turning it back on. This time allows the adhesive material

What if I Applying Too Much?

If you apply too much thermal paste to your CPU or GPU, you will stuck in  on the chip and cause it to malfunction. If thermal paste gets into the wrong place, you may also have a higher chance of overheating and damaging your computer.

The amount of paste to use depends on the processor or graphics card type and how much heat it generates. You should always start with a small amount, then reapply more if necessary.


Choosing the right thermal paste for your application is a big decision. If you make the wrong choice you could be giving your product a bad rep.

Different thermal pastes have different properties that make them well-suited for different applications. For example, a very thin paste with an ultra-thin layer of metal on top. It may be the perfect thermal paste for a product that you can drench with liquid, like a cooler or PC. A thicker paste with a heavier metal layer on top. You may need it for applications where you can expose the product to a lot of heat and pressure, like in a power supply.


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