How to Choose the Right Rubber Material: EPDM vs NBR vs Silicone vs Viton (FKM)

Choosing the right rubber material is one of the fastest ways to improve product life, reduce downtime, and avoid unexpected failures in the field. The wrong choice can lead to swelling, cracking, leaks, loss of elasticity, or premature wear—even when the part looks correct on paper.

This guide breaks down four common industrial elastomers—EPDM, NBR (nitrile), silicone, and FKM (often known as Viton)—and how to pick the right one for your application.

Start with four questions:

1. What does the rubber contact? (oil, fuel, water, steam, chemicals, solvents)

1. What temperature range will it see? (continuous and peak)

1. Is it outdoors? (UV, ozone, weather, salt)

1. What’s the main failure risk? (leaks, wear, compression set, chemical attack)

Quick rule-of-thumb: EPDM: best for weather, ozone, water/steam NBR (Nitrile): best for oils, fuels, hydraulic fluids Silicone: best for wide temperatures and flexibility FKM (Viton): best for high heat and aggressive oils/chemicals

EPDM: EPDM is known for strong resistance to UV, ozone, and weather, making it a good choice for outdoor use and water-related applications. Avoid EPDM for petroleum oils and fuels.

NBR (Nitrile): NBR is widely used because it performs well with petroleum-based oils and fuels. It’s a strong option for seals and gaskets used around oils, fuels, and many hydraulic fluids. For long-term outdoor exposure, it may not be the best pick unless properly protected/compounded.

Silicone: Silicone stays flexible across a wide temperature range and performs well when elasticity matters. It’s often chosen for temperature cycling. It’s not ideal for heavy abrasion or tearing, and fluid compatibility depends on the application.

FKM (Viton): FKM is often selected for harsh conditions where heat and chemical resistance are required. It typically costs more, but it can deliver longer service life in demanding environments.

Common mistakes to avoid:

. Picking based on “what we used last time” without checking fluid/temperature changes

. Ignoring peak temperatures

. Not specifying the exact contact media

. Forgetting outdoor UV/ozone exposure

How to request the right material (and get faster quotes): Include the application type, contact media, temperature range, indoor/outdoor exposure, dimensions or drawing, quantity, and required timeline.

Need help choosing: If you’re deciding between EPDM, NBR, silicone, or FKM, contact Premium Rubber with your application details and we’ll recommend a suitable option.