How to Choose Elastomers

A Quick Guide to Common Elastomers & Their Traits

Let us help you choose elastomers that will fit your needs and project. Arm yourself with the information you need to make an appropriate decision. The elastomer selection chart below contains key information. Use it to assist you in choosing the elastomer that will work best for your project.

Aero’s experienced sales engineers stand ready to guide you towards the best solution for your distinct needs.

As you choose elastomers, remember:

  • All of the traits of rubber are trade-offs. If a polymer is good for something, it is usually bad at something else. It is important to know what the rubber (aka “elastomer”) will be used for and where it will be exposed.
  • Each rubber manufacturer has their own elastomer recipes. Each one is a trade secret.
  • A rubber compound can be a blend of two or more elastomers (elastomers are major ingredients in different rubber compounds). This formulation recipe influences the finished part’s function, service life and competitive pricing.
  • The chosen elastomers’ formulation (recipe) will affect the physical properties of the part, its function and service life. It is the user’s responsibility to test a sample part or lab sample to determine the performance characteristics and suitability of the compound for the specific function and service life.elastomer questions choose an elastomer guide
  • Use the information presented herein only as a general “guide”. We cannot guarantee its completeness, nor accuracy, nor assume responsibility for its use due to the myriad of combinations and uses.

Questions we’ll ask!

  • What will the part be used as?
  • Is there a specific material specification needed such as ASTM or Military Spec?
  • Will it need to hold up to any harsh conditions or chemicals? In use or cleaning!
  • Under what conditions will it be used?

Choose Elastomers Based on Traits

Elastomer Characteristics Temp.
Min-Max*
Ozone Resistance UV Resistance Grease/Oil Resistance Fuel Resistance Solvent Resistance Abrasion Resistance Tear Resistance Tensile Strength Non-Latex
Elastomer Common Names                    
Natural Rubber Gum Rubber Polyisoprene
-55° F to 200° F Poor Poor Poor Poor Poor Good Good Excellent No
Synthetic Natural Synthetic Polyisoprene -55° F to 200° F Poor Poor Poor Poor Poor Good Good Excellent Yes
Neoprene Chloroprene Polychloroprene -40° F to 220° F Good Good Good Fair Poor Fair Good Good-Fair Yes
Nitrile Buna ‘N’ NBR -30° F to 250° F Poor Poor Excellent Excellent Excellent Fair Good Good-Fair Yes
Hydrogenated Nitrile Butadiene Rubber (HNBR) -20° F to 300° F Poor Poor Excellent Excellent Fair Fair Good Excellent-Good Yes
SBR Buna ‘S’ GRS -20° F to 212° F Good Good Poor Poor Poor Excellent Good Good-Fair Yes
EPDM EPT EP -60° F to 250° F Excellent Excellent Poor Poor Poor Good Good Good-Fair Yes
EPDM Peroxide Cured -60° F to 300° F Excellent Excellent Poor Poor Poor Good Excellent Excellent-Good Yes
Silicone -100° F to 450° F Excellent Excellent Poor Poor Poor Poor Poor Poor Yes
Fluorosilicone -100° F to 400° F Excellent Excellent Good Good Good Poor Poor Fair Yes
Fluoroelastomer (FKM) Viton (DuPont) Fluorel (3-M) -10° F to 400° F Excellent Excellent Excellent Excellent Good Good Good Fair Yes
Butyl -60° F to 250° F Excellent Excellent Poor Poor Poor Good Good Good Yes
Hypalon (trade name) (CSM) Chlorsulphonated Polyethylene -40° F to 250° F Excellent Excellent Good Good Poor Good Good Good Yes
Polyurethane (Ether or Ester Based) -90° F to 225° F Excellent Excellent Excellent Good Poor Excellent Excellent Excellent Yes

View and download the complete guide below to choose elastomers. This elastomer selection guide includes more tips and elastomer properties to help you. For your preference, we have included both the new full color guide and our original guide. Use the one that works best for you!

Rubber 101: Choose Elastomers

Choosing Elastomers v.1

Elastomer selection guide - Choose Elastomers

Choosing Elastomers v.2

 


Note #1: The information provided above is for reference purposes only. It is intended to be utilized as a “guide” when comparing the typical physical properties of different materials. Aero recommends that the buyer perform any tests required to determine the performance characteristics and suitability of a particular material for a specific application and elastomer selection.

Note #2: A rubber compound can be a blend of two or more elastomers (when compatible) in order to influence the finished part’s function and service life as well as competitive pricing.

Note #3: “Typical Temperature Range” is unrelated to any particular use or application. It is a general guideline to compare with other elastomers. Field tests of part samples by the user and ASTM lab tests of compound slabs are necessary to determine functional acceptability and service life.

Note#4: Latex Free vs Non Latex – The FDA recommends using the term Non Latex. “The reason for this recommendation is that the agency is not aware of any tests that can show a product contains no natural rubber latex proteins that can cause allergic reactions. Without a way to verify that a product is completely free of these proteins, a claim that it is “latex free” is scientifically inaccurate and may be misleading.” Read More

Google + LinkedIn FacebookVimeo