Polyurethane Material Selection Guide for Industry

aircraft wheel chock, even if both are exposed to heavy weight.

For each application, establish the maximum working load and include realistic margins for dynamic forces. Vehicles rolling into a chock, forklifts changing direction, and a lift settling onto a pad create forces that differ from static weight. Consider how the load is distributed. A broad contact face reduces local stress, while a narrow edge or small pad concentrates it.

Also identify what the polyurethane touches. Painted aircraft wheels, finished vehicle lifting points, epoxy-coated floors, concrete, steel forks, and wet ramp surfaces all require a different balance between grip, firmness, and surface protection. A component that protects the load but slides on the floor is not a safe solution.

Hardness: Balance Support, Grip, and Surface Protection

Polyurethane hardness is commonly described on the Shore scale. Many industrial elastomer components use the Shore A scale, where lower numbers are softer and more flexible, while higher numbers are firmer and more load-bearing. Hardness is useful, but it is not a complete specification. Two materials with the same Shore rating can behave differently because of their formulation, geometry, and how they are manufactured.

Softer polyurethane generally conforms better to uneven surfaces and can provide better grip and cushioning. This is useful where a product must protect painted or finished surfaces, absorb vibration, or remain stable on imperfect concrete. The trade-off is that soft material may compress more under a sustained heavy load and can be less suitable for thin, highly loaded sections.

Harder polyurethane generally offers better dimensional stability and resistance to deformation. It is often the better choice for wear pads, support blocks, and parts that must maintain a precise shape through repeated loading. The trade-off is reduced conformity. If the contact surface is delicate, hard, or uneven, a firmer part may transfer more localized pressure than intended.

For vehicle-lift pads, the right answer is usually a controlled compromise: enough firmness to support the vehicle securely, with enough resilience to avoid damaging the designated lifting point. For aircraft chocks, the geometry, tire contact profile, and anti-slip behavior are as important as hardness. Material selection should never be separated from the product design.

Match the Material to the Environment

Industrial polyurethane performs well in many demanding settings, but exposure conditions still matter. Specify the real environment, including what happens during cleaning, storage, and seasonal weather, not only during normal use.

Oil, fuel, grease, hydraulic fluid, cleaning agents, salt, water, UV exposure, and temperature changes can affect performance over time. Ask whether contact is occasional splashing, frequent contamination, or continuous immersion. A workshop pad that sees intermittent oil drips has a different requirement from a component used near recurring fuel handling.

Temperature is another frequent source of poor selection. Cold conditions can make some elastomer materials firmer and less flexible. Heat can increase compression and affect long-term shape retention. Outdoor ramp equipment, road-safety products, and warehouse equipment near loading doors may see large temperature swings in a single year. Select a formulation proven for the expected range rather than relying on indoor test conditions.

UV and weather exposure deserve attention for products stored outdoors. Color change may be cosmetic, but surface degradation, loss of flexibility, or reduced service life are operational concerns. If a part must remain in service outside, specify that use from the beginning.

Consider Compression Set, Not Just Load Capacity

A polyurethane part can carry a load without immediately failing and still be the wrong choice. Compression set measures how much permanent deformation remains after a material has been compressed for a period of time. In practical terms, it indicates whether a pad, block, or mat returns toward its original shape after repeated use.

Low compression set matters for lift pads, support elements, anti-fatigue mats, and any part expected to maintain thickness or geometry. If a material takes a permanent set, it may reduce stability, alter fit, create uneven support, or lose the ergonomic feel workers rely on.

Duty cycle changes the decision. A pad used a few times per week may perform well with a different formulation than one used across multiple service bays every day. Ask how long the part remains loaded, how many cycles it sees, and whether it has time to recover between uses. Long-duration static loading and rapid repeated cycling are separate engineering cases.

Use Geometry to Reduce Material Stress

Material selection and part shape work together. Increasing thickness, widening the contact area, adding ribs, rounding corners, or changing the profile can improve performance without simply choosing a harder compound. This is particularly relevant for chocks, blocks, pads, and custom polyurethane components.

Sharp internal corners concentrate stress and can encourage tearing. Thin edges can curl or wear quickly. A larger footprint can improve floor contact and distribute load, but it may also affect storage space, clearance, and handling. In aviation and ground support, product weight matters as well. A lighter chock is easier to carry and position, but it must still provide the required wheel restraint and stable contact.

This is why application-specific products are often a better purchase than generic blocks of material. Rosén Innovation develops polyurethane products around defined jobs such as aircraft wheel restraint, vehicle lifting, worker comfort, and equipment protection, where dimensions and material behavior are designed together.

Verify Safety-Critical Requirements Before Ordering

Where failure can damage equipment or injure people, purchasing should verify more than material type. Confirm the product dimensions, fit, intended equipment category, maximum use conditions, and placement method. A chock must match the wheel and operating procedure. A lift pad must fit the lift adapter and vehicle lifting point. A forklift safety block must be used as part of an approved maintenance process, not as a substitute for proper lockout or support procedures.

Before standardizing a product across a fleet, workshop, or site, test it under representative conditions. Include the actual floor surface, typical contamination, the heaviest expected equipment, and the workers who will handle it. Evaluate whether the product is easy to position with gloves, easy to inspect, and easy to replace when worn.

Inspection criteria should be defined before the first order. Look for cuts, cracking, permanent deformation, edge damage, loss of grip, and contamination that cannot be cleaned effectively. Replacing a worn safety item on time costs less than recovering from an unstable lift or damaged aircraft.

Specify Procurement Requirements Clearly

A useful purchase specification states the application, dimensions, hardness or performance range where relevant, load and contact conditions, environmental exposure, color or visibility needs, and expected quantity. It should also state whether the product needs to be recyclable, stocked for rapid replacement, or available in bulk quantities.

For facilities and resellers, standardizing selected sizes can simplify inventory and reduce ordering errors. For specialized equipment, exact compatibility is more valuable than broad standardization. The goal is not to buy the hardest or cheapest polyurethane item. It is to buy the part that performs safely over its intended service life, protects the equipment it contacts, and keeps work moving.

The best next step is to take one recurring problem - a slipping chock, damaged lifting point, worn work surface, or tired standing team - and define its load, environment, and contact conditions before choosing the material. That one disciplined check usually makes the correct polyurethane option much clearer.

">

A wheel chock that is too soft can creep under load. A lift pad that is too hard can mark a vehicle’s lifting point. A mat selected only by thickness may still fatigue workers or fail at the edges. This polyurethane material selection guide starts where industrial purchasing decisions should start: with the actual load, contact surface, operating environment, and safety consequence of failure.

Polyurethane is not one fixed material. It is a family of materials that can be formulated across a wide range of hardness, elasticity, density, abrasion resistance, and chemical resistance. That flexibility makes it useful for aviation, vehicle service, warehouse operations, manufacturing, and facilities work. It also means that selecting by appearance alone is a costly shortcut.

Start the Polyurethane Material Selection Guide With the Job

The correct material is determined by what the part must do repeatedly, not simply by what it must withstand once. Begin by defining the equipment, the load path, the contact area, and the duty cycle. A polyurethane plate used as a sacrificial wear surface has different requirements from an aircraft wheel chock, even if both are exposed to heavy weight.

For each application, establish the maximum working load and include realistic margins for dynamic forces. Vehicles rolling into a chock, forklifts changing direction, and a lift settling onto a pad create forces that differ from static weight. Consider how the load is distributed. A broad contact face reduces local stress, while a narrow edge or small pad concentrates it.

Also identify what the polyurethane touches. Painted aircraft wheels, finished vehicle lifting points, epoxy-coated floors, concrete, steel forks, and wet ramp surfaces all require a different balance between grip, firmness, and surface protection. A component that protects the load but slides on the floor is not a safe solution.

Hardness: Balance Support, Grip, and Surface Protection

Polyurethane hardness is commonly described on the Shore scale. Many industrial elastomer components use the Shore A scale, where lower numbers are softer and more flexible, while higher numbers are firmer and more load-bearing. Hardness is useful, but it is not a complete specification. Two materials with the same Shore rating can behave differently because of their formulation, geometry, and how they are manufactured.

Softer polyurethane generally conforms better to uneven surfaces and can provide better grip and cushioning. This is useful where a product must protect painted or finished surfaces, absorb vibration, or remain stable on imperfect concrete. The trade-off is that soft material may compress more under a sustained heavy load and can be less suitable for thin, highly loaded sections.

Harder polyurethane generally offers better dimensional stability and resistance to deformation. It is often the better choice for wear pads, support blocks, and parts that must maintain a precise shape through repeated loading. The trade-off is reduced conformity. If the contact surface is delicate, hard, or uneven, a firmer part may transfer more localized pressure than intended.

For vehicle-lift pads, the right answer is usually a controlled compromise: enough firmness to support the vehicle securely, with enough resilience to avoid damaging the designated lifting point. For aircraft chocks, the geometry, tire contact profile, and anti-slip behavior are as important as hardness. Material selection should never be separated from the product design.

Match the Material to the Environment

Industrial polyurethane performs well in many demanding settings, but exposure conditions still matter. Specify the real environment, including what happens during cleaning, storage, and seasonal weather, not only during normal use.

Oil, fuel, grease, hydraulic fluid, cleaning agents, salt, water, UV exposure, and temperature changes can affect performance over time. Ask whether contact is occasional splashing, frequent contamination, or continuous immersion. A workshop pad that sees intermittent oil drips has a different requirement from a component used near recurring fuel handling.

Temperature is another frequent source of poor selection. Cold conditions can make some elastomer materials firmer and less flexible. Heat can increase compression and affect long-term shape retention. Outdoor ramp equipment, road-safety products, and warehouse equipment near loading doors may see large temperature swings in a single year. Select a formulation proven for the expected range rather than relying on indoor test conditions.

UV and weather exposure deserve attention for products stored outdoors. Color change may be cosmetic, but surface degradation, loss of flexibility, or reduced service life are operational concerns. If a part must remain in service outside, specify that use from the beginning.

Consider Compression Set, Not Just Load Capacity

A polyurethane part can carry a load without immediately failing and still be the wrong choice. Compression set measures how much permanent deformation remains after a material has been compressed for a period of time. In practical terms, it indicates whether a pad, block, or mat returns toward its original shape after repeated use.

Low compression set matters for lift pads, support elements, anti-fatigue mats, and any part expected to maintain thickness or geometry. If a material takes a permanent set, it may reduce stability, alter fit, create uneven support, or lose the ergonomic feel workers rely on.

Duty cycle changes the decision. A pad used a few times per week may perform well with a different formulation than one used across multiple service bays every day. Ask how long the part remains loaded, how many cycles it sees, and whether it has time to recover between uses. Long-duration static loading and rapid repeated cycling are separate engineering cases.

Use Geometry to Reduce Material Stress

Material selection and part shape work together. Increasing thickness, widening the contact area, adding ribs, rounding corners, or changing the profile can improve performance without simply choosing a harder compound. This is particularly relevant for chocks, blocks, pads, and custom polyurethane components.

Sharp internal corners concentrate stress and can encourage tearing. Thin edges can curl or wear quickly. A larger footprint can improve floor contact and distribute load, but it may also affect storage space, clearance, and handling. In aviation and ground support, product weight matters as well. A lighter chock is easier to carry and position, but it must still provide the required wheel restraint and stable contact.

This is why application-specific products are often a better purchase than generic blocks of material. Rosén Innovation develops polyurethane products around defined jobs such as aircraft wheel restraint, vehicle lifting, worker comfort, and equipment protection, where dimensions and material behavior are designed together.

Verify Safety-Critical Requirements Before Ordering

Where failure can damage equipment or injure people, purchasing should verify more than material type. Confirm the product dimensions, fit, intended equipment category, maximum use conditions, and placement method. A chock must match the wheel and operating procedure. A lift pad must fit the lift adapter and vehicle lifting point. A forklift safety block must be used as part of an approved maintenance process, not as a substitute for proper lockout or support procedures.

Before standardizing a product across a fleet, workshop, or site, test it under representative conditions. Include the actual floor surface, typical contamination, the heaviest expected equipment, and the workers who will handle it. Evaluate whether the product is easy to position with gloves, easy to inspect, and easy to replace when worn.

Inspection criteria should be defined before the first order. Look for cuts, cracking, permanent deformation, edge damage, loss of grip, and contamination that cannot be cleaned effectively. Replacing a worn safety item on time costs less than recovering from an unstable lift or damaged aircraft.

Specify Procurement Requirements Clearly

A useful purchase specification states the application, dimensions, hardness or performance range where relevant, load and contact conditions, environmental exposure, color or visibility needs, and expected quantity. It should also state whether the product needs to be recyclable, stocked for rapid replacement, or available in bulk quantities.

For facilities and resellers, standardizing selected sizes can simplify inventory and reduce ordering errors. For specialized equipment, exact compatibility is more valuable than broad standardization. The goal is not to buy the hardest or cheapest polyurethane item. It is to buy the part that performs safely over its intended service life, protects the equipment it contacts, and keeps work moving.

The best next step is to take one recurring problem - a slipping chock, damaged lifting point, worn work surface, or tired standing team - and define its load, environment, and contact conditions before choosing the material. That one disciplined check usually makes the correct polyurethane option much clearer.