FKM (Fluoroelastomer / Viton) vs PP (Polypropylene): 0% composition overlap. Significantly different materials serving different application areas.
FKM (Fluoroelastomer / Viton) vs PP (Polypropylene)
Side-by-side chemical composition and mechanical property comparison.
Overview
FKM (Fluoroelastomer / Viton)
Fluoroelastomer — THE high-temperature and chemical-resistant rubber. Outstanding resistance to oils, fuels, acids, and solvents at temperatures up to 200°C (short-term 230°C). Fluorine content (64-70%) determines chemical resistance. Trade names: Viton (Chemours), Tecnoflon (Solvay), Dai-El (Daikin). 5-10x more expensive than NBR. Used for aerospace fuel seals, chemical process seals, automotive fuel injector O-rings, semiconductor processing, and any seal exposed to aggressive chemicals at high temperature.
PP (Polypropylene)
Polypropylene is the most produced plastic globally by volume. Semi-crystalline thermoplastic with excellent chemical resistance, low density (0.90–0.91 g/cm³ — lightest engineering plastic, floats in water), good fatigue resistance (living hinges) and low cost. Available as homopolymer (higher stiffness) and copolymer (better impact). Trade names: Moplen (LyondellBasell), Sabic PP (SABIC), Borealis PP. Used for packaging, automotive bumpers/interiors, medical devices, piping, hinges, containers, textiles (nonwoven) and household goods.
| FKM (Fluoroelastomer / Viton) | PP (Polypropylene) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 37 | ISO 1873 |
Chemical composition (wt%) — Pro
| Element | FKM (Fluoroelastomer / Viton) | PP (Polypropylene) | Overlap |
|---|---|---|---|
| Vinylidene Fluoride (VDF) | 30–60% | — | — |
| Hexafluoropropylene (HFP) | 25–45% | — | — |
| Tetrafluoroethylene (TFE) | 0–30% | — | — |
| Base Polymer (Polypropylene) | — | 99–99.9% | — |
Mechanical properties — Pro
| Property | FKM (Fluoroelastomer / Viton) | PP (Polypropylene) | Unit |
|---|---|---|---|
| Tensile Strength | 8–17 | — | MPa |
| Elongation | 150–350 | — | % |
| hardness_shore_a | 60–90 | — | Shore A |
| Density | |||
| continuous_service_temp | |||
| Tensile Strength | |||
| Tensile Modulus | |||
| Elongation at Break | |||
| Charpy Impact (notched, 23°C) | |||
| Charpy Impact (notched, -20°C) | |||
| Density | |||
| Melting Point | |||
| HDT/A (1.8 MPa) | |||
| Water Absorption (24h) |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
FKM (Fluoroelastomer / Viton) and PP (Polypropylene) have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is FKM (Fluoroelastomer / Viton) the same as PP (Polypropylene)?
FKM (Fluoroelastomer / Viton) and PP (Polypropylene) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace FKM (Fluoroelastomer / Viton) with PP (Polypropylene)?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between FKM (Fluoroelastomer / Viton) and PP (Polypropylene)?
The main differences are in the following elements: overall alloying content. FKM (Fluoroelastomer / Viton) is a Polymers grade, while PP (Polypropylene) is a Polymers grade.
View full data for each material:
Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.