RUBBER ELASTOMERS

FKM Black

FKM BLACK ELASTOMERS

FKM BLACK SEAL MATERIAL

FKM Black, also known as FPM or Viton® Black, is a fluoroelastomer with outstanding resistance to high temperatures, ozone, weathering, and a wide range of chemicals.
This material demonstrates excellent chemical resistance against mineral oils, sulfur-containing lubricants, HFD fluids, crude oil, and sour gas, making it a reliable choice for demanding sealing solutions.

FKM Black is commonly used in applications where durability, long-term stability, and resistance to aggressive media are essential.

However, it has certain limitations: FKM Black shows reduced resistance to anhydrous ammonia, amines, alkalis, ketones, esters, hot steam, and low-molecular-weight organic acids.

KEY ADVANTAGES OF FKM BLACK

Wide operating temperature range

from –20 °C to +200 °C (short-term up to +250 °C).

Chemical resistance

excellent compatibility with mineral oils, fuels, lubricants, and aggressive process fluids.

Ozone and weather resistance

highly resistant to ozone, UV radiation, and environmental aging.

Superior wear resistance

long service life under friction, dynamic loads, and high pressure.

Reliability in harsh conditions

suitable for oil & gas, chemical, and energy industries.

Applications

FKM Black seals and bushings are widely used in:

Oil & gas industry (sealing in contact with crude oil, sour gas, and aggressive media)
Chemical and energy equipment (pumps, compressors, valves)
Automotive industry (fuel systems, engine components)
Aerospace and marine technology (high-temperature sealing solutions)
Equipment operating under high pressure and extreme conditions

Resistance FKM Black elastomers

Good resistance

Mineral oils (standard, refined)

Aliphatic hydrocarbons (propane, butane, petrol, methane)

Silicone oils and greases

Vegetable and animal oils, synthetic esters

Fuels (diesel, kerosene, jet fuels, biofuels)

Oils with soot and highly aromatic oils

Fire-resistant hydraulic fluids HFD-S, HFD-R

Lubricants with sulfur, crude oil, sour gas (H₂S)

Ozone, UV, weathering

Average resistance

Hot water (up to +80 °C)

Steam up to +150 °C

Some organic acids (citric, lactic)

Fire-resistant hydraulic fluids HFA, HFB, HFC

Polar solvents in diluted form

Alcohols (ethanol, isopropanol – limited use)

Biodegradable hydraulic fluids (depending on additives)

Skydrol® (phosphate ester hydraulic fluids – limited)

–

Low resistance

Anhydrous ammonia

Hot steam (>150 °C)

Amines, alkalis

Low-molecular organic acids (acetic, formic)

Polar solvents (acetone, MEK, dioxane, ethyl acetate)

Methanol

Brake fluids based on glycol

Hydrofluoric acid, chlorosulfonic acid

–

FKM Black Material Data Sheet

Properties

Value

Unit

Standard

Hardness at 20°:

85 +/-2

Shore A

DIN 53505

Density:

1,88

g/cm³

DIN ISO 1183-1

100% Modulus:

N/mm²

DIN 53504

300% Modulus:

N/mm²

DIN 53504

Tensile strength:

>12

N/mm²

DIN 53504

Elongation at break:

>180

DIN 53504

Rebound resilience:

DIN 53512

Tear strength:

>21

N/mm²

DIN ISO 34-1

Abrasion:

<150

mm³

DIN 53516

Compression set:*

DIN ISO 815-1

Compression set:**

<20

DIN ISO 815-1

Compression set:***

DIN ISO 815-1

Min. service temperature:

-20

°C

–

Max. service temperature (short term):

+210 (+230)

°C

–

*Compression set @ 23°C, 72 hours, 10% deflexion
**Compression set @ 70°C, 24 hours, 20% deflexion
***Compression set @ 100°C, 24 hours, 20% deflexio

All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.

TEST ALPANA QUALITY

We take pride in our seal-making raw materials and are ready to offer samples of our semi-finished products. For testing, we provide our most popular materials, including the Max series of polyurethanes: H-Pur, SH-Pur, XSH-Pur, XH-Pur—as well as rubber bushings: NBR, FKM, H-NBR, EPDM, and MVQ!

FKM Black

FKM BLACK ELASTOMERS

FKM BLACK SEAL MATERIAL

KEY ADVANTAGES OF FKM BLACK

Wide operating temperature range

Chemical resistance

Ozone and weather resistance

Superior wear resistance

Reliability in harsh conditions

Applications

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