You Need to Know a Simple Guide to Felt Seal

We already know that felt is an incredibly versatile textile with many uses. Apart from the fashion industry and creative art projects, you will also find the felt seal as an integral component of machinery and other tools.

This article will learn more about felt seals, their types, uses, and advantages. You will also discover how to order the best-quality seals for various applications.

Table of Contents

Colored felt rolls

Chapter 1. What Factors do You Need to Consider When Choosing a Felt Seal?

Car insulation fibre

The felt seal is pressed fiber to prevent leakages or connect two items. We mostly use wool to make these seals, although synthetic textiles can be an alternative. It is a type of mechanical seal used in many industries.  

You can find felt seals of different hardness, and their use may depend on that. This is a popular sealing option because you can expect excellent resilience and oil absorption capabilities. That is what makes this material versatile for various applications.

Thickness may vary from 1/8 inch to more than two inches (1-50mm). The density you will select will depend on your desired application.

If we are discussing industrial use of the felt seal, you want to go with top-quality materials. That means you should choose only wool-felt seals, which are more durable than standard nonwoven and needled seals. Not only can you get them at affordable rates, but you will get an excellent ratio between price and quality. It will be a reliable solution that ensures your application runs smoothly.         

Chapter 2. What Types of Felt Seals are Available?

Black roofing felt

We can divide felt seals into various categories, but picking a suitable option for your application is important. You might need a technical felt seal or machinery that can handle high pressure. You can consider compressed seals only in situations without rubbing contact. The manufacturers soak these units in oil and then use oil film for lubrication and separation.

Industrial quality seals are required for high-pressure and other extreme conditions. They can maintain severe environments and ensure that everything works smoothly.


The first division of felt seals depends on hardness. When discussing density, you want to find units with at least 0.18g/cm3. However, please note that these are rather soft seals, so you can quickly maximize their absorption characteristics. Once that happens, they will start leaking oils and lubricants.

You can also go for materials that are denser and harder. However, the rule is that a hard wool-felt seal is more expensive than a soft one. That still keeps it budget-friendly, but if you want to control costs, you don’t have to look for more density than needed for your application.


The next division relates to colors. If aesthetics are important, choose felt seals of different colors. People often wear black and grey as those seals do not attract attention and fit into most environments. However, you can also consider cream, white, and other colors. The best distributors will listen to consumers’ requests and ensure to dye the seals to the required color.


Apart from picking the colour and hardness, you can also pick the shape of your felt seal. Does your application require a square seal? Or do you believe that a triangle shape would be a better fit?

The manufacturers can do felt seals in any shapes you can imagine, including rectangles, squares, trapezoids, triangles, circles, etc. it is up to you to decide which shape you need. We suggest checking out your application and assessing the shape that fits it best. From there, finding the most suitable option and ensuring adequate results should be easy.

Pressure Seals

If you are considering using the felt seal in industrial environments, the chances are that they will need to work in high-pressure conditions. Laminated seals can be a smart choice to meet the specific requirements of your application. That way, you can expect the product to perform multiple functions. These seals can meet your expectations if you need your unit to maximize dust prevention and oil retention.

The manufacturers can be incredibly accurate, and it only depends on your requirements. If you specify precise measurements, the seals can meet those demands to ensure they fit your application perfectly.

Chapter 3. What is the Use of Felt Seals?

Felt fabric sheets

In this section, we will check out some major uses of felt throughout different industries.

Felt Oil Seal

The manufacturers use soft felt with exceptional flexibility that can endure rubbing against the housing or shaft while ensuring no fluid or oil leakage. You will also notice that these seals maintain shaft contact with their cushioning capabilities.

The idea is to keep the lubricant in place, which means it shouldn’t be able to escape or enter the machine. You will often find this seal type in tractors and other machinery. Furthermore, it is an essential part of many machines.

Dust Felt Seal

You should use specialized dust felt if you don’t want any dirt and dust going into the bearing. The idea is to keep debris away and ensure it doesn’t affect ball-bearing operation. If you use these seals in bearings, they will act as isolators. That means their task is to keep any dust away and prevent it from entering the bearings.

Door Felt Seal

You don’t want to deal with air leakage once you close the door. That is where door-felt seals could be of huge importance. Imagine if your room has a heating and cooling system. You want to ensure to maintain the insulation at the highest level. You don’t want the outside air to disrupt the room’s temperature.

Ball Bearing Felt Seal

If you are using seals for this application, we recommend going with grease lubrication. The good news is that these are cost-effective and have a simple working process. Additionally, they can withstand high temperatures.

Other Uses

Here are some other common uses of these products:

  • Ball mill machines – if you are a mining industry expert, you are probably familiar with ball mill machines. It uses felt seals in trunnion sealing. You may also find seals holding batter doors, valves, and pumps.
  • Dryers – the popular household appliance may use these seals to hold the gap between the cabinet and the drum. It is an addition that can keep the clothes safe during operation. These can easily be replaced once they wear out.
  • Automobile industry – you may find these in washers used in this industry and in some other components.
  • Plummer block – the goal is to prolong the lifespan of the bearing even if it dries up. These seals are effective as rotating shaft support in pillow block bearings.

Chapter 4. What are the Benefits of a Felt Seal?

Felt squares

Versatility is not the only advantage of felt seals. Here are some other benefits that you can expect from these materials:

  • Excellent resistance to chemicals– the material can absorb grease, oil, was, and other compounds. That is what makes felt seals suitable to use in lubricants, solvents, fuels, water, etc.
  • Resilience – if you choose high-quality wool felt, you will be surprised by how effective it is in withstanding severe weather conditions. Whether it is constant pressure, wear, and there, or harsh environmental factors, these seals can continue delivering continuous results.
  • Absorbing oil – although it has other advantages, many users felt seals for storing oil.
  • Polishing – the seals can capture any abrasive compounds, which polishes and protects the surfaces.
  • High-temperature application– you can use wool felt in up to 250F, but synthetic materials can withstand up to 400F. The material also works in cold environments as it can function as long as the temperature is not lower than -60F.
  • Shaft speed – the experts suggest that you shouldn’t use these seals in environments where the FPM is higher than 2,000. You can design smooth and hard shafts, and use generous seal lubrication to make them accommodate 4,000FPM, but that is only for extreme application.
  • Filtration – depending on the type of seal you choose, the products will identify and remove particles as tiny as 0.7 micrometers. It is an excellent way of protecting your application and ensuring it works smoothly regardless of dust and debris.

Chapter 5. Where Can I Get a Felt Seal?

An isolated felt fabric sample

The easiest way to get a felt seal is to order it online. You can receive the desired seals to your doorstep quickly. We offer an industrial-grade felt seals of the highest quality, and we are ready to meet any bulk orders.

We guarantee the best ratio of cost and quality and felt seals that can ensure consistent and durable results with various applications. Get in touch with us today and learn why thousands of customers were delighted with the quality of the felt seals we deliver.


Felt seals are incredibly versatile products that you can use throughout many industries. If your application needs to prevent leakages, you can seal any gap with these seals. The crucial thing is to pick the right seal for your requirements. As long as you choose properly, you will benefit from many advantages and long-lasting results of these products!

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