Rubber Materials for Seals & Molded Parts
NBR, EPDM, FKM, HNBR, Silicone and custom rubber compounds for seals, O-rings and molded components.
Find the Right Rubber Material Faster
Temperature alone is not enough. Media, pressure, sealing mode, outdoor exposure and regulatory requirements can all change the correct material choice.
Oil & Hydraulic Fluids
NBR, HNBR and FKM are common starting points when resistance to oils or hydraulic media is important.
Water & Outdoor Exposure
EPDM is commonly evaluated for water, weather and ozone-related sealing conditions.
Higher Temperature
FKM and Silicone may be considered when the application places greater demands on temperature resistance.
Medical Components
Silicone is used by YIHO in selected medical rubber components including stethoscope and equipment parts.
Automotive Sealing
YIHO works with EPDM, NBR, HNBR and FKM across different automotive rubber-part applications.
Rubber Materials Used Across YIHO Products
Different products require different elastomer families. YIHO's current product range includes NBR, EPDM, FKM, HNBR, XNBR, Silicone and several specialty rubber materials.
NBR is used by YIHO in O-rings, general rubber components and selected automotive rubber parts.
EPDM is used across YIHO O-rings, micro pump rubber components and selected automotive rubber parts.
FKM is included in YIHO's material range for O-rings, pump rubber components and automotive parts.
HNBR is used by YIHO for O-rings, general rubber components and selected automotive applications.
Silicone is used across YIHO medical components, stethoscope ear tips, pump parts, keypads and other molded silicone products.
XNBR is included in YIHO's documented material options for selected O-ring applications.
CR is one of the material options included in YIHO's documented range for general rubber products.
Fluorosilicone, SBR, ACM and AEM are also listed in YIHO's current rubber material portfolio for selected applications.
Compare Common Rubber Material Options
Use the table as an initial discussion guide rather than a final material specification. Compound formulation and actual operating conditions still need to be confirmed.
| Material | General Engineering Selection Focus | YIHO Documented Applications | Before Final Selection |
|---|---|---|---|
| NBR | Commonly considered for seals used around oils and hydraulic media. | O-rings, general rubber products and selected automotive rubber parts. | Confirm medium, temperature, hardness and sealing conditions. |
| EPDM | Commonly considered for water, weather and ozone-exposed applications. | O-rings, micro pump rubber parts and selected automotive components. | Confirm actual fluid compatibility and outdoor service conditions. |
| FKM | Often evaluated for applications involving demanding temperature or fluid conditions. | O-rings, pump rubber components and automotive rubber parts. | Confirm media, temperature range and required compound specification. |
| HNBR | May be considered where a nitrile-based material is required for more demanding service conditions. | O-rings, general rubber products and selected automotive parts. | Confirm operating medium, temperature, hardness and mechanical requirements. |
| Silicone | Commonly used for flexible molded components and selected medical and electronic applications. | Medical parts, stethoscope ear tips, pump parts, silicone parts and keypads. | Confirm service conditions and any required compliance documentation. |
| CR | Available as one of several elastomer options for selected molded rubber requirements. | General rubber products. | Confirm the application before specifying the final compound. |
Start With What the Rubber Part Needs to Do
Many buyers begin with a component and operating problem rather than a polymer name. Matching the material to the application reduces unnecessary trial-and-error during sampling.
O-Rings & Static Seals
Suitable material selection depends on the fluid, pressure, temperature and sealing environment.
Pump & Valve Components
Diaphragms, leather cups, valve plates and rubber components for micro air pumps, water pumps and vacuum pumps.
Automotive Rubber Parts
Rubber sealing components for cooling tanks, wiring harnesses, dust covers and related automotive assemblies.
Medical Silicone Parts
Silicone components used in selected stethoscope, sphygmomanometer, atomizer and air-mattress applications.
Electronics & Keypads
Silicone rubber components for electronic devices, mechanical switches, remote controls and interface parts.
General Industrial Rubber Parts
Sealing and damping components used in machinery, electronics, agriculture, petrochemical and sanitary applications.
Rubber Material Development for Custom Parts
YIHO supports rubber material development according to customer requirements and combines this capability with mold design and manufacturing. Considering the material, tooling and finished part together can reduce unnecessary adjustments during sample development.
Application Requirements
Share the drawing, application, expected working conditions, hardness and relevant project requirements.
Material Direction
Review suitable rubber material options and determine whether the project requires additional material development.
Mold & Sample Development
Coordinate the selected material with part dimensions, mold design and manufacturing requirements.
Sample Review & Production
Review samples against the agreed drawing and project requirements before moving into repeat production.
Information to Confirm Before Rubber Material Selection
The more complete the application information is, the easier it is to narrow down an appropriate material direction before mold development and sampling.
Operating Temperature
Provide the expected normal operating range and any temporary temperature peaks that may occur.
Contact Medium
Identify whether the rubber part will contact oil, water, air, coolant, fuel or other media.
Pressure & Application Type
Explain whether the component will be used in static sealing, pneumatic, hydraulic, vacuum or another operating condition.
Hardness Requirement
Specify the required hardness when it is already defined on the drawing or by the existing application.
Environment
Let us know whether the finished part will be exposed to outdoor weather, moisture or other relevant environmental conditions.
Compliance Requirements
Confirm any required RoHS, REACH, FDA-related or customer-specific compliance requirement before the material is finalized.
Common Rubber Material Selection Mistakes
Material selection should consider the finished part, operating conditions and manufacturing requirements together, rather than relying on a material name alone.
Choosing Only by Temperature
Temperature is only one part of the operating environment. The material should also be reviewed against the actual medium and application conditions.
Treating Every Compound as Identical
A polymer name such as NBR, EPDM or FKM does not identify one universal formulation. The exact compound still needs to match the project requirement.
Selecting Material Before the Application Is Clear
A material recommendation remains incomplete when temperature, medium, pressure, hardness or expected service conditions are still unknown.
Ignoring Part Geometry and Production Requirements
The selected polymer family may be suitable for the application while the actual part geometry or molding process still creates production challenges.
A Practical Custom Rubber Part Development Process
YIHO coordinates project requirements, material discussion, mold development and sample review step by step, helping custom rubber parts move clearly from the initial drawing to repeat production.
Submit Project Data
Share the drawing, application, expected quantity and project requirements.
Engineering Review
Review part structure, operating conditions and manufacturing needs.
Material Confirmation
Confirm the rubber material direction, hardness and key requirements.
Sample Development
Prepare the mold approach and develop samples for review.
Sample Review
Review the sample against the drawing and project requirements.
Repeat Production
Move into production after the sample and requirements are confirmed.
See How Rubber Materials Become Finished Components
Material selection only creates value when it performs correctly in the finished component. Explore YIHO's rubber product capabilities.
O-Rings
Rubber sealing rings for mechanical, fluid, hydraulic and pneumatic applications.
EXPLORE PRODUCTSRubber Button Boot
Flexible silicone button boots designed to protect switches and controls from dust, moisture and wear.
EXPLORE PRODUCTRubber-to-Metal Parts
Rubber and metal structures developed for applications requiring durable integrated molded assemblies.
EXPLORE PRODUCTSRubber Bellows Seal
Flexible rubber bellows designed to protect moving components from dust, dirt and environmental exposure.
EXPLORE PRODUCTRubber Material Selection Questions
Practical answers for purchasing and engineering teams before material confirmation, mold development and production.
Start with the application, working medium, operating temperature, pressure, required hardness, drawing and any compliance requirements. These details provide a better basis for discussing the appropriate rubber material before mold development.
These are different elastomer families used for different operating conditions. NBR is commonly considered for oil-related sealing, EPDM for water and weather-exposed applications, and FKM for more demanding temperature or fluid conditions. Final suitability depends on the exact compound and application.
YIHO's current product documentation includes NBR, EPDM, FKM, HNBR, XNBR, Silicone, CR, Fluorosilicone, SBR, ACM and AEM across different rubber and silicone product applications.
Yes. YIHO supports rubber material development according to customer requirements and combines this capability with mold design and manufacturing for custom rubber parts.
Send the drawing if available together with the application, contact medium, operating temperature, pressure, target hardness, expected quantity and any required regulatory or customer-specific standard.
YIHO's current product documentation references RoHS and REACH requirements across multiple rubber products, while selected silicone applications also reference FDA requirements. Please provide the required compliance standard when requesting a quotation so the applicable material and documentation can be confirmed for your project.