Learn the differences in hardness, flexibility, cost and ease of production between plastic and rubber gaskets.
Gaskets are among the critical parts that provide sealing by closing the gap between two surfaces. The two most commonly used types of materials in the industryplastic gasketAndrubber gasket (especially EPDM)These two materials show different properties in terms of hardness, flexibility, ease of production and cost.
In this article, we will explain which gasket type is more advantageous under which conditions.with technical data and usage examplesWe will compare.
General Features of Plastic Gasket
Description and Production MethodPlastic gaskets are generally produced from thermoplastic materials (PP, PE, PTFE, etc.) by injection molding method. This method provides high precision and fast mass production.
Advantages:
- lightweight construction
- High chemical resistance
- Low production cost
- Long life against corrosion
Disadvantages:
- low flexibility
- Limited resistance to high temperatures
- Medium sealing
Areas of Use:
- Electrical-electronic enclosures
- White goods assembly parts
- food processing machinery
Rubber Gasket (EPDM) General Features
Description and Production MethodEPDM (Ethylene Propylene Diene Monomer) rubber gaskets are known for their high elasticity and weather resistance. They can be produced by compression molding and injection molding techniques.
Advantages:
- high flexibility
- Operation between -40°C and +120°C
- Resistance to UV, ozone and outdoor conditions
- Superior sealing
Disadvantages:
- Low chemical resistance to some solvents
- Higher cost than plastic gaskets
Areas of Use:
- Automotive sealing parts
- Industrial machinery seals
- Ventilation and air conditioning systems
Comparison of Hardness and Flexibility
| Feature | Plastic Gasket | Rubber Gasket (EPDM) |
| Hardness (Shore) | 70-90D | 50-70A |
| Flexibility | Low | High |
| Impact Resistance | Middle | High |
| sealing | Middle | High |
- plastic gasket,high hardnessIt provides advantages at installation points that require it.
- EPDM rubber gasket isvibration and shock absorberIts features make it more suitable for moving parts.
Price / Performance Analysis
- plastic gasketIdeal for low-cost mass production.
- rubber gasketIt gives return on investment in projects requiring high sealing and long life.
- In the long run, a rubber gasket may be more durable than plastic in outdoor conditions.
Ease of Production and Cost Impact
- Plastic Gasket:Fast production, low waste rate, low unit cost with injection molding
- Rubber Gasket:Longer production process, post-molding treatment may be required, unit cost higher
Which one should be preferred in which situation?
- If it will work in chemical environments:Plastic gasket (special polymers such as PTFE)
- If high tightness and flexibility are required:EPDM rubber gasket
- If outdoor and UV resistance is required:EPDM rubber gasket
- If budget is a priority:plastic gasket
Sector Based Recommendations:
- Automotive:EPDM rubber
- Food and medical:Silicone or food-safe plastic
- White goods:plastic gasket
- Industrial machine:Plastic or rubber, depending on usage condition
Conclusion and Recommendations
Choosing the right gasket material directly affects product life and efficiency. As İdeal Plastik, we produce both plastic and rubber gaskets.Engineering support specific to your projectAndsample supplyWe provide.
Request a material sample that best suits your project
Email: sinangokce@idealplastik.com.tr
Telephone: +90 212 612 68 40 / 41
Address:Istanbul – Türkiye
Related guides
Continue reading: What is a Gasket? Types and Areas of Use.
Continue reading: Can Electrical Insulation Be Provided with Plastic Gasket?.