What Is Viscosity?

Viscosity is a measure of a fluid's resistance to flow. In simpler terms, it describes how thick or thin a liquid is. Honey, for instance, has a higher viscosity than water—it's thicker and flows more slowly. In lubricants, higher viscosity means the grease is thicker and less likely to run or drip away from the areas where it's needed.

Why Should Lubricants Have High Viscosity?

The right viscosity is key to a lubricant's performance. Grease with too low viscosity might not maintain a sufficient lubricating film under high pressure or high load, resulting in increased wear and potential equipment failure. Conversely, grease that is too viscous may not spread evenly or reach all the necessary areas within a machine.

What Makes High Viscosity Grease Special?

High-viscosity grease is specially formulated to perform in situations where heavy loads, high pressures, and slow movements are involved. This type of grease retains its structure and does not easily get squeezed out of the area it's protecting.

Heavy Load-Carrying Capacity

High-viscosity grease can withstand heavy loads without breaking down. This makes it ideal for applications involving significant weight or force that could otherwise displace lower-viscosity lubricants. We recommend our popular Lithium EP0 Grease for high-load applications, as it is built to withstand not only shock absorption but also provides mechanical stability and corrosion resistance.

Superior Sealing Properties

Its thick consistency allows high-viscosity grease to act as a sealant, preventing contaminants such as dust, dirt, and water from entering and damaging components.

Reduced Leakage and Consumption

Because of its thickness, high-viscosity grease is less prone to leakage. This results in less frequent reapplication, saving time and reducing lubricant consumption.

Improved Performance in Extreme Conditions

High-viscosity grease excels in harsh environments, maintaining its protective qualities in extreme temperatures and under high friction. For these types of processes, we highly recommend our High Speed Grease 2 to ensure your lubricant stays in place when running.

Assessing Your Equipment’s Needs

When choosing a grease, consider factors such as load, speed, temperature, and environmental conditions. For recommendations, consult equipment manuals or a lubrication specialist.

Understanding NLGI Grades

The National Lubricating Grease Institute (NLGI) grades grease based on its consistency. Higher NLGI numbers indicate thicker, more viscous greases. High-viscosity greases typically fall within the higher NLGI grades.

Compatibility with Other Lubricants

Ensure that the high-viscosity grease you select is compatible with any other lubricants or greases used in your equipment to avoid adverse reactions and poor performance.



High-viscosity grease plays a pivotal role in protecting heavy-duty machinery and equipment in demanding conditions. By understanding its unique characteristics and proper application, you can ensure your equipment runs smoothly and lasts longer. Remember that maintenance, correct usage, and responsible disposal are just as important as selecting the right product! To make sure you find the right grease for you, get in touch with team101 to find out more.




What Is High Viscosity Grease?

Posted by Emily | BSPOQ on 26th Jun 2024

What Is High Viscosity Grease?

In this blog, we breakdown what high-viscosity grease is, why it's important, and where it's most effectively used.

Close Side Bar Button