Elastomers FAQs

What is the difference between EP, EPR, and EPDM?
Why it is not recommended to apply pressure-sensitive adhesives onto solid EPDM rubber, low durometer (10 to 40 Shore A) Neoprene and Buna-N?
Why is post-cured silicone important for rubber for high temperature gasket applications?
Which gaskets can I use for FDA applications?
Does Phelps have any gaskets that are approved to the NSF 61 for Drinking Water?
Which gaskets work in Flange Isolation Kits?
What is Gasohol, and which gasket materials are good for Gasohol applications?
Can I use painters tape on cork?
What is the recommended Shelf Life for gaskets?
Does Phelps have materials and gaskets that meet USDA requirements?

• What is the difference between EP, EPR, and EPDM?
  Related: Elastomers

  EPR is an abbreviation for Ethylene-propylene copolymer, while EPDM is an abbreviation for Ethylene-Propylene Terpolymer. From a functional standpRead more...

  ---

• Why it is not recommended to apply pressure-sensitive adhesives onto solid EPDM rubber, low durometer (10 to 40 Shore A) Neoprene and Buna-N?
  Related: Elastomers

  EPDM compounds often contain certain chemical additives, such as paraffins, which migrate to the surface over time. When this happens, an adhesive bacRead more...

  ---

• Why is post-cured silicone important for rubber for high temperature gasket applications?
  Related: Elastomers

  Some silicone rubber compounds utilize curing agents that require a secondary post-cure to finish the curing process. Although most silicones can passRead more...

  ---

• Which gaskets can I use for FDA applications?

  There are quite a few classes of materials that are safe for use in Food applications, and thereby FDA compliance. Phelps Style 7205 is FRead more...

  ---

• Does Phelps have any gaskets that are approved to the NSF 61 for Drinking Water?
  Related: Gasket Material

  Yes, Phelps carries multiple products suitable for Drinking Water applications. Phelps Style 7100 - Aramid with Nitrile Binder, which is direcRead more...

  ---

• Which gaskets work in Flange Isolation Kits?
  Related: Gasket Material

  Customers will occasionally ask for a flange insulation or isolation kit or gasket to electrically insulate one flange from the mating flange. Kits arRead more...

  ---

• What is Gasohol, and which gasket materials are good for Gasohol applications?
  Related: Gasket Material

  Gasohol is a blend of gasoline with an alcohol— usually 10 - 15% ethyl alcohol. In such applications most rubber gaskets are NOT recommended. FRead more...

  ---

• Can I use painters tape on cork?

  Yes but be very careful how long you leave the tape on it and carefully remove it because the adhesive on the back on the tape “MAY” damagRead more...

  ---

• What is the recommended Shelf Life for gaskets?

  Please visit Phelps' General Age of Elastomers for detaisl on each type of materials - (non)Elastomers, Graphites, PTFE etc.Read more...

  ---

• Does Phelps have materials and gaskets that meet USDA requirements?
  Related: Food Grade Nitrile

  Yes, Phelps carries many materials with that are Food Grade and meet the FDA and USDA requirements Phelps Food Grade Nitrile Phelps Food Grade PacRead more...

  ---