Moulded rubber products in the motorsport industry

Automotive rubber has several different uses, but it is commonly found in motorsport applications to enhance safety, improve longevity and optimise performance.  

The uses of rubber in the automotive industry are varied, with rubber materials and polyurethane plastic used in tyres, seals, engine mounts, hoses and tubing, and interior components for road cars, racing cars and classic cars.

Moulded rubber is manufactured through a process where raw elastomers or silicone are shaped into custom 3D products using heat, pressure and specific cavities.

At Aquaseal Rubber, we are expert rubber manufacturers UK and global businesses rely on to support their projects in the automotive industry, including motorsport.

Why moulded rubber is preferred in motorsport

Moulded rubber is used in motorsport because it provides vital vibration dampening, extreme fluid and temperature-resistant sealing and bespoke component shapes for intricate parts of a chassis. It protects racing parts under high stress from harsh physical forces, shock and thermal fatigue.

Moulded rubber in automotive industry applications, especially motorsport projects, is used because it:

• Enhances performance: moulded rubber provides flexibility, grip, vibration dampening and durability to support reliable performance in demanding conditions.
• Offers thermal and chemical resistance: specialist rubber compounds withstand high temperatures and exposure to fuels, oils and other chemicals, protecting critical components.
• Reduces friction and weight: lightweight, precisely moulded components reduce unnecessary mass while providing low-friction surfaces and controlled movement between components.
• Provides aerodynamic precision: moulded rubber seals, gaskets and profiles create precise interfaces between bodywork and components to maintain consistent airflow and aerodynamic performance.

Also, the motorsport industry uses polyurethane products when extra life is needed in arduous applications, especially where precision, longevity and safety are the most important factors.

Where is moulded rubber used in motorsport?

Moulded rubber products are vital in motorsport applications for sealing, vibration control and fluid containment under extreme racing conditions.

All types of motorsport incorporate moulded rubber parts in certain applications, but in different ways for a variety of reasons.

Since polyurethane is important in the automotive industry too, polyurethane plastic can be moulded into applications on its own, or used alongside moulded rubber to create a high-performance composite component.

Open-wheel racing

The importance of rubber products in Formula 1 means that specific types of automotive rubber is used for different applications.

Moulded products made from natural rubber, styrene-butadiene rubber (SBR) and polyurethane plastic can be used where different levels of flexibility and durability are needed in suspension and chassis components.

Rubber mouldings made from silicone and EPDM help isolate high-frequency engine and drivetrain vibrations from the chassis while withstanding demanding conditions. Moulded rubber pads and covers can provide grip in pedal and control components to provide greater control and comfort for drivers.

Closed-wheel racing

Closed-wheel racing includes endurance, touring car and NASCAR categories, where cars compete in long-distance, bumper-to-bumper or high speeds and drifting races.

Rubber profile and mouldings, usually made from EPDM because of its weather resistance, help seal body panels and openings against water, dust and debris. Viton (FKM) is used in fluid seals and rubber gaskets that are exposed to fuel, oil and elevated temperatures, whilst moulded rubber pads, mounts and isolations reduce vibrations from the engine, exhaust and other mechanical systems, helping to protect components and improve driver comfort.

Rally racing

Rally cars require specific rubber products that generate critical tyre friction, absorb kinetic shocks from rough terrain and flexibly seal vital mechanical components against dirt, water and extreme temperatures.

In rally cars, moulded rubber components are used in suspension bushes and mounts to provide controlled flexibility whilst absorbing vibration and shock, as well as in engine, gearbox and exhaust mounts, where silicone and heat-resistant elastomers are useful for components exposed to elevated temperatures. Bodywork and impact protection is provided through rubber edging, bump stops and protective mouldings which help cushion impacts and prevent damage to vehicle components.

Motorcycle racing

Moulded rubber is used in motorcycle racing because its precision manufacturing allows it to handle extreme loads, seal critical components and vulcanise exact tread profiles.

Engine and frame mounts use moulded rubber components to isolate engine vibration from the motorcycle frame and rider, improving durability and comfort. Footrest and control components are made from rubber to provide traction and reduce vibration transferred to the driver, whilst rubber dampers are incorporated intro drivetrain systems to absorb torque fluctuations and reduce shock loads between components. EPDM is often used in moulded rubber boots and seals to protect suspension, steering and other moving components from water and debris.

Common materials used in moulded rubber components

Certain rubber materials are better suited for use in the motorsport industry because of their unique properties and ability to protect critical components and enhance driver safety.

Silicone offers excellent high-temperature resistance, flexibility and weathering performance which makes it suitable for components exposed to heat and changing environmental conditions. It is used for:

• Engine and exhaust components
• Electrical protection
• Sealing components

Nitrile is resistant to oils, fuels and abrasion, making it a practical choice for motorsport components that are exposed to petroleum-based fluids, and is found in:

• Fuel system components
• Engine and transmission systems
• Hydraulic systems

EPDM has properties which makes it extremely resistant to weathering, ozone, water and heat, making it well suited to motorsport parts that are exposed to harsh outdoor conditions. It is used for:

• Weather and environmental seals
• Suspension and vibration components
• Cooling systems
• Electrical components

The benefits of custom moulded automotive rubber in motorsport

Choosing custom moulded automotive rubber for your motorsport applications, regardless of racing series, can be beneficial for performance, safety and operations.

The benefits of moulded rubber in motorsport include:

• Precision: manufactured to precise dimensions and tolerances, moulded rubber fits accurately within complex automotive assemblies and support reliable sealing, cushioning and vibration control.
• Repeatability: once a mould and manufacturing process have been established, identical rubber components can be produced consistently across large production runs to maintain quality and simplify assembly.
• Performance consistency: controlled material selection and manufacturing processes ensure components deliver consistent levels of flexibility, durability, sealing and resistance to heat, chemicals and wear.

Choose Aquaseal Rubber to support your motorsport project

At Aquaseal Rubber, we understand the importance of choosing the right moulded rubber product for your motorsport application.

That’s why our team is here to support you in meeting safety requirements and performance milestones with bespoke rubber solutions for the automotive industry.

Contact us to discuss your requirements.