10 Surprising Facts About Polyurethane in the Automotive World
When it comes to vehicle performance, most drivers think about engines, brakes, or tyres—but few realise how vital polyurethane (PU) is to modern automotive design. From suspension precision to ride comfort and durability, polyurethane has become one of the most important materials in today’s cars.
At Polybush, we specialise in high-performance polyurethane suspension bushes, engineered to outperform traditional rubber alternatives. Here are 10 surprising facts about polyurethane—and why it’s the smart choice for your vehicle.
1. From Wartime Innovation to Performance Essential
Polyurethane was originally developed during World War II as a replacement for scarce natural rubber. Today, it has evolved into a premium automotive material, widely used in suspension bushes, engine mounts, seals, and performance components.
Unlike rubber, polyurethane does not degrade as quickly, making it ideal for long-lasting suspension solutions like Polybush products.
2. Revolutionised Ride Comfort and Control
Polyurethane foam transformed automotive seating in the 1950s, but solid polyurethane has done the same for vehicle handling. In suspension systems, PU bushes maintain geometry under load, ensuring better steering response, stability, and driver feedback—especially under hard driving or towing conditions.
3. Built to Withstand Heat, Oil, and Harsh Conditions
Rubber bushes are prone to cracking, softening, and perishing when exposed to heat, oil, and road contaminants. Polyurethane, however, is highly resistant to chemicals, moisture, and extreme temperatures, making it perfect for demanding suspension applications.
That’s why Polybush suspension bushes last significantly longer than rubber equivalents.
4. Engineered for High-Performance Suspension
Polyurethane can be moulded precisely, allowing manufacturers like Polybush to produce tight-tolerance suspension bushes that improve handling without compromising safety.
Used in:
Suspension bushes
Shock absorber mounts
Anti-roll bar bushes
Chassis and drivetrain components
PU delivers strength, flexibility, and consistency where rubber simply can’t compete.
5. Available in Multiple Hardness Ratings
One of polyurethane’s biggest advantages is tunability. Unlike rubber, polyurethane suspension bushes can be manufactured in multiple hardnesses (Shore ratings).
At Polybush, this means:
Softer compounds for road comfort
Medium hardness for fast road and towing
Harder compounds for motorsport, off-road, and performance use
This allows you to tailor your suspension exactly to your driving needs.
6. Reduces Unwanted Movement Without Excess Noise
Polyurethane bushes reduce excessive flex found in worn rubber bushes, keeping suspension components correctly aligned. This leads to:
Reduced tyre wear
More predictable handling
Increased braking performance
Polybush products are engineered to minimise noise and vibration, offering a perfect balance between comfort and performance.
7. Plays a Role Throughout the Entire Vehicle
Beyond suspension, polyurethane is used in:
Tyres (as performance additives)
Engine and gearbox mounts
Seals and gaskets
Protective coatings
Its versatility makes PU one of the most widely used materials in automotive manufacturing.
8. Supports Lightweight, Efficient Vehicle Design
As vehicles become lighter and more efficient, polyurethane is increasingly used in body panels, bumpers, and structural components. Its high strength-to-weight ratio helps reduce mass without sacrificing durability—benefiting both fuel economy and performance.
9. Holds Vehicles Together—Literally
Polyurethane adhesives and sealants bond metal, plastic, and glass throughout modern vehicles. These strong yet flexible bonds improve structural integrity and crash safety while reducing unnecessary weight.
10. A Key Material in Electric and Future Vehicles
Polyurethane is now essential in electric vehicles, used for:
Battery pack protection
Thermal insulation
Vibration damping
As EVs evolve, polyurethane—and especially durable suspension components—will continue to play a vital role.
Why Polybush Polyurethane Suspension Bushes Are the Best Choice
Replacing worn rubber bushes with Polybush polyurethane suspension bushes delivers immediate and long-term benefits:
Longer lifespan than rubber
Improved handling and steering precision
Resistance to oil, heat, and road grime
Multiple hardness options to suit your driving style
Designed and manufactured for performance and durability
Whether you drive a classic car, daily commuter, 4×4, or performance vehicle, Polybush polyurethane bushes provide a smarter, stronger, and more reliable upgrade.
Upgrade Your Suspension with Polybush
Polyurethane might be your vehicle’s hidden performance advantage—and with Polybush, you’re choosing expertly engineered suspension solutions built to last.
Contact Polybush today to find the right polyurethane suspension bushes for your vehicle and experience the difference in performance, control, and longevity.






































