PTFE advantages and disadvantages

PTFE Uses, Advantages and Limitations

Updated 29/01/2026

Polytetrafluoroethylene, PTFE, or Teflon® is one of the most widely used high‑performance polymers in critical industries such as oil & gas, chemical processing, semiconductor manufacturing, aerospace and pharmaceuticals. Its exceptional chemical resistance and low friction make it an attractive material choice, but PTFE is not always the best solution.

This guide is designed to help engineers, buyers and designers understand when PTFE is the right choice, when it is not, and which alternative materials may perform better depending on the application, or jump to our FAQs at the bottom of the page.

Table of Contents

Key Properties of PTFE

Material Selection Matrix by Industry

Application‑Specific Guidance

Typical Processing Methods

Frequently Asked Questions (FAQ)

 

Key Properties of PTFE

Property Typical Performance
Temperature range −200°C to +260°C
Chemical resistance Excellent (almost universal)
Coefficient of friction Extremely low
Electrical insulation Excellent
Elastic recovery Poor (no memory)
Creep resistance Limited (improves with fillers)
Wear resistance Low in virgin PTFE

Takeaway: PTFE excels chemically and thermally but is mechanically weak unless modified.

Material Selection Matrix by Industry

Industry Typical PTFE Use When to Avoid PTFE Preferred Alternative
Oil & Gas Valve seats, gaskets High load dynamic seals PEEK, filled PTFE
Chemical Processing Linings, seals Wear‑critical parts Filled PTFE
Semiconductor Seals, tubing Structural components PFA, PEEK
Aerospace Insulation, seals Load‑bearing parts Polyimide
Food & Pharma FDA gaskets Dynamic sealing Silicone

 

Application‑Specific Guidance

1. PTFE Seals

Best for:

      • Chemical processing

      • Oil & gas static sealing

      • Semiconductor equipment

Pros:

      • Outstanding chemical resistance

      • Handles extreme temperatures

Cons:

      • No elastic recovery

      • Can creep under constant load

When to consider alternatives:

      • FKM / FFKM for pressure cycling

      • Spring‑energised PTFE for critical sealing

2. PTFE Bearings and Slide Bearings

Best for:

      • Low load, low speed, dry‑running systems

      • Corrosion‑sensitive environments

Pros:

      • Very low friction

      • No lubrication required

Cons:

      • Poor wear resistance in virgin form

Better options:

      • Bronze‑filled PTFE for wear resistance

      • Metal‑backed PTFE bearings for load capacity

3. PTFE in Oil & Gas Applications

Where PTFE works well:

      • Valve seats

      • Gaskets

      • Linings exposed to chemicals

Where PTFE struggles:

      • High‑pressure dynamic sealing

      • High mechanical loads

Recommended alternatives:

      • Filled PTFE for valve components

      • PEEK for high load, high temperature parts

4. PTFE in Semiconductor & High‑Purity Industries

Advantages:

      • Ultra‑clean

      • Chemically inert

      • Excellent dielectric properties

Design considerations:

      • Thermal expansion must be managed

      • Not suitable for load‑bearing structures

Common alternatives:

      • PFA for improved clarity and weldability

      • PEEK for structural components

 

Typical Processing Methods

PTFE has a very high-melt viscosity and a high-melting temperature which makes traditional processing methods difficult. Typical processing methods include Cold Compression Moulding & Sintering, RAM Extrusion, Paste Extrusion, Isostatic Moulding, and Moulding & Skiving.

Frequently Asked Questions (FAQ)

Is PTFE always the best choice for chemical resistance?

Yes. PTFE offers near-universal chemical resistance and outperforms most elastomers and plastics in aggressive chemical environments. However, chemical resistance alone should not determine material selection — mechanical load, wear and sealing performance must also be considered.

When should PTFE not be used?

PTFE should be avoided in applications involving high mechanical loads, significant wear, or pressure cycling where elastic recovery is required. In these cases, materials such as PEEK, filled PTFE, or elastomers may provide better long-term performance.

What is cold flow (creep) in PTFE?

Cold flow, also known as creep, is the tendency of PTFE to deform permanently under sustained load. This can lead to loss of sealing force over time. Creep can be reduced by using filled PTFE grades or spring-energised sealing designs.

Is filled PTFE better than virgin PTFE?

In most wear-critical or load-bearing applications, yes. Fillers such as glass fibre, bronze or carbon significantly improve wear resistance, dimensional stability and creep performance, while maintaining PTFE’s chemical resistance.

Can PTFE replace elastomer seals?

PTFE can replace elastomers in static sealing or chemically aggressive environments, but it does not provide elastic recovery. For dynamic or pressure-cycling applications, elastomers or spring-energised PTFE seals are usually a better choice.

What is the difference between PTFE and PEEK?

PTFE excels in chemical resistance and low friction, while PEEK offers superior mechanical strength, wear resistance and dimensional stability. PEEK is often selected where PTFE lacks the structural performance required.

Is PTFE suitable for food and pharmaceutical applications?

Yes. PTFE is FDA-compliant, non-toxic and non-contaminating, making it suitable for food and pharmaceutical use. However, for applications requiring flexibility or frequent movement, silicone or other elastomers may be preferred.

How does temperature affect PTFE performance?

PTFE performs well across a wide temperature range (−200°C to +260°C). However, its high thermal expansion must be considered during design, particularly in precision or tight-tolerance applications.

What are common applications for PTFE in oil and gas?

Typical applications include valve seats, gaskets, seals and chemical linings. For high-load or high-pressure dynamic components, filled PTFE or PEEK is often more suitable.

How do I choose the right PTFE grade?

Selecting the correct PTFE grade depends on chemical exposure, temperature, pressure, wear requirements and regulatory compliance. Working with a supplier who offers material selection support and engineered components helps ensure optimal performance.

If you’re unsure whether PTFE is the right material for your application, working with a supplier who can provide both raw material and engineered components helps shorten the supply chain and reduce risk. To find out how we can support your projects, contact info@fluorocarbon.co.uk

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