Molded Rubber Parts for Automobiles

The Automotive industry readily uses custom-molded rubber parts for several parts in the vehicle. Moreover, there is more than one type of rubber material that helps aid the whole driving experience. These rubber-molded components include seals, gaskets, hoses, etc.

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On top of it, they come with a range of benefits and uses. We will cover everything in detail in this article. Keep reading to learn more!

Types of Rubber Materials Used In The Automotive Industry

Like any other industry, the automotive sector uses various rubber materials to produce vital components. These include:

black rubber parts for automobiles
  • Silicone Rubber: silicone products tend to withstand weather and heat pretty well. Hence, they perform exceptionally well for automobile components in the form of gaskets and seals that frequently come in contact with heat.
  • Thermoplastic Rubber: this type of rubber material tends to withstand abrasion. Moreover, it has excellent flexibility. Hence, a lot of dynamic applications in automobiles benefit from TPR components.
  • Natural Rubber: taken from the sap of rubber trees, natural rubber tends to offer good elasticity. 
  • EPDM: This synthetic rubber polymer shows excellent resistance to outdoor factors. These include ozone, heat, and a variety of chemicals. Hence, using EPDM rubber components in automobiles makes a lot of sense since they always come in contact with outdoor elements. This is also why so many rubber manufacturers produce EPDM products.
  • Nitrile Rubber: this rubber material is often found in fuel and oil systems in the form of seals and gaskets. Why? Because nitrile tends to show excellent resistance to various oils and fuels. 

Is There Any Benefit of Using Molded Rubber for Automobiles?

As discussed above, molded rubber components come in various materials featuring many properties. Hence, the automotive industry sees a prevalent use of molded rubber for automobiles all because of the benefits it has to offer:

rubber molded components in different sizes, shapes for automobiles
  • Weather Resistance: many rubber materials, such as EPDM, tend to resist harsh weather conditions pretty well. Hence, they become suitable for custom rubber molding automotive parts. They ensure everything stays in working order no matter what the condition.
  • Dampening: rubber is a significant dampener, be it vibration or noise. Moreover, rubber materials with high flexibility absorb shocks to prevent damage. Hence, engine mounts, bushings, and suspension systems often use molded rubber automotive parts.
  • Economical: apart from everything discussed above, rubber does not cost much. Hence, it helps reduce the overall production price while offering a reliable solution to many custom rubber molding applications in the automotive industry.
  • Highly Customizable: rubber has high customizability be it the easy molding techniques or the way it can be easily shaped into any desired form. Moreover, manufacturers can also easily color rubber components for easy distinction.
  • Durable: often, components in vehicles have to face high stress, heat, and vibration. Fortunately, rubber tends to withstand all of these pretty impressive, making it a highly durable material for automobile components.
  • Eco-Friendly: Unlike plastic, the rubber naturally decomposes. Moreover, recycling and disposing of rubber safely is far easier than plastic. Hence, the overall carbon impact is reduced, making it an eco-friendly option.

Common Molded Rubber Products for Automobiles

The automotive industry is one of the most prominent users of custom rubber molding products. The top examples include:

black rubber mud flap on a red car
  • Bushings: help prevent two automotive parts from coming in contact due to vibration. Hence, they absorb noise and vibration energy to ensure no damage occurs. 
  • Belts: rubber belts are vital in transferring power from one component to another. For instance, a rubber belt moves the generator gears to energize the battery, giving the vehicle power and air conditioning.
  • Tires: rubber is a flexible material that absorbs shocks, so using a rubber tire makes sense. Also, rubber has high durability, which means the tires can go on for years if maintained properly.
  • Hoses: you will find them in fuel and engine oil systems, which help transport these fluids from one place to another. Rubber hoses specifically resist oils, chemicals, and powers to save transportation.
  • Weatherstripping: nobody wants rainwater or wind dust inside their vehicles. Hence, rubber weatherstripping creates tight seals between gaps in windows and doors.
  • Mounts: The engine and body use rubber mounts to reduce noise and vibrations.
  • Mud Flaps and Bumpers: the mud flaps and bumpers you see on most vehicles also use molded rubber. These custom rubber parts help protect the car and its components from impact, dirt, debris, and rocks.

How Do I Get My Hands On The Right Molded Rubber Part for My Needs?

It’s not easy, but it’s also not impossible. If you keep the following factors in mind, nothing can stop you from getting the right molded rubber automotive parts for your needs:

black rubber tire and alloy rim


First and foremost, work with a reputable manufacturer. On top of it, make sure they have good reviews and customer service.

Often, a reputable rubber manufacturer helps ensure that you get the right molded rubber components that solve your needs. This helps them earn long-term business partnerships.


Analyze your conditions and the need of the hour. Make sure you know the temperature, weather, and other conditions using molded rubber automotive parts. Once you do, you can opt for the suitable rubber material for the application.


While ensuring you are getting the right products for your needs is vital, you must also know whether the manufacturer can offer the required capacity. This also calls into question the future capacity, especially if you see business expansion shortly.


Unfortunately, your budget also determines what kind of custom rubber molding products you can get. As a result, you must do thorough research before making any decision.

Make a list of reliable manufacturers and see what prices they offer. Always go for the most value provided in the least amount of money.

What Do You Put On The Rubber In Your Car To Make It Last Longer?

Despite having a long life, rubber requires general maintenance to avoid mechanical failure. Hence, there are some things that you apply or even do to make rubber in your car last longer. These include:

rubber hose in engine fuel system


Manufacturers who produce molded rubber products also have protectants for specific rubber materials. These help nourish the rubber and keep it from drying or cracking. Moreover, the protectant also helps keep external elements at bay.


Just like protectants, lubricants prove vital in dynamic applications. Without proper lubrication, the rubber component will give in to the extreme friction and heat between moving parts.

Hence, ensure to get the suitable lubricants and apply them on a timely basis. The most commonly used oils are silicone based. However, you can also get specifically formulated ones for your custom rubber products.

Bonus Maintenance Tips

Custom Rubber Molding in factory


By storage, we don’t mean taking out the custom rubber products and storing them in boxes. That would be foolish and impossible.

Instead, we mean that whenever you plan to park your car for extended periods, use a car cover and park it under shade. This helps keep external factors such as ozone, UV, and heat at bay.

Keep Away from Harsh Chemicals

Even though some rubber materials resist chemicals, we advise avoiding unwanted chemicals.

Hence, ensure no accidental spills happen; if they do, you properly clean the rubber component.

Regular Inspection and Cleaning

It is generally a good habit to inspect and clean different vehicle components regularly. This not only helps you stay on top of maintenance but also helps avoid any mechanical failures.

As a result, make sure you make it a habit to check for any faults, cracks, or drying out rubber components. You don’t necessarily have to do this every week or month, but once or twice every quarter should be good.

Faqs: Rubber Molded Parts for Automobiles

car in cold with rubber weatherstripping

What car parts are made of rubber?

Several car components, such as seals, hoses, gaskets, belts, etc., are made from rubber. Rubber provides exceptional properties, which the automotive industry benefits from. Hence,

How is rubber used in the automotive industry?

Rubber is used in different forms to create tight seals, transport fluids, protect the equipment, and absorb shocks and vibrations. On top of it, rubber also helps reduce the overall costs of manufacturing and avoid mechanical failures in the long run.

How do you make rubber-molded parts?

Rubber molded parts can be made using different techniques. However, most reliable manufacturers stick to the following four: compression molding, injection molding, transfer molding, and die cutting.

How much rubber is used in cars?

The simple answer to this is a lot. Rubber is used as weatherstrips in doors and windows. Moreover, the fuel system, engine, and other significant components use rubber seals, gaskets, hoses, belts, bushings, and mounts.


To conclude, the automotive industry has tremendous scope for molded rubber components. So much so that the demand stays high throughout the globe. If you are running a rubber parts business and know the benefits, uses, and materials, you need a reliable manufacturer to work with.

At Hongju, We Only Sell Premium Molded Rubber Parts for Automobiles.

Hongju is a name of trust and reliability in the rubber industry. We have decades of experience and the latest technology to offer precisely shaped and premium-Ly formed rubber parts for automobiles. Get In touch today!

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Hey there, I’m David!

I’m the founder of Hongju Silicone. I have been in this field for more than two decades. If you are looking for custom-made silicone rubber products, feel free to ask me any questions.

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