There are several types of grease that can be used in a heavy-duty grease gun, each with its own unique properties and applications. Here are some common types of grease and their characteristics:

1. Lithium-based grease: This is a popular choice for heavy-duty applications due to its excellent water resistance, high-temperature stability, and good load-carrying capacity. It is also widely used in automotive and industrial applications.

2. Calcium-based grease: Calcium-based grease, also known as calcium sulfonate grease, is known for its water resistance and good adhesion to metal surfaces. It is often used in automotive wheel bearings and other applications where water contamination is a concern.

3. Aluminum complex grease: This type of grease offers good Custom Mini Grease Gun high-temperature performance, excellent resistance to water washout, and good load-carrying capacity. It is often used in automotive and industrial applications where high temperatures and water exposure are common.

4. Polyurea-based grease: Polyurea-based grease is known for its excellent high-temperature performance, low friction, and resistance to extreme pressures. It is often used in high-performance applications, such as racing engines and aerospace equipment.

5. Synthetic grease: Synthetic greases are formulated using synthetic base oils, which offer improved performance over traditional mineral oils. They often have better temperature stability, resistance to oxidation, and longer service life. Synthetic greases are available in various types, such as polyalphaolefin (PAO), perfluopolyether (PFPE), and silicone-based greases.

6. Graphite-based grease: Graphite-based grease is known for its excellent water resistance and ability to penetrate into tight spaces. It is often used in marine and off-road applications where water exposure is common.

7. Molybdenum disulfide (MoS2) grease: This type of grease contains molybdenum disulfide as an additive, which provides excellent anti-friction and anti-wear properties. It is often used in applications where extreme pressures and low friction are required.

8. Bio-based grease: Bio-based greases are formulated using renewable, biodegradable base oils, such as vegetable oils or synthetic esters. They are environmentally friendly and can be used in applications where environmental impact is a concern.

When selecting a grease for your heavy-duty grease gun, consider factors such as the operating temperature, load requirements, and environmental conditions. It is also essential to consult the equipment manufacturer's recommendations for the appropriate type and grade of grease to ensure optimal performance and longevity.