Fluoroelastomer Specialists
Buna, ethylene propylene diene monomer (EPDM) and Viton are all similar seal materials, but what makes them different? Choosing the right elastomer or polymer material is important for several reasons. While it may not seem like a major decision, the material chosen determines the quality, life span and performance of an application. From snapping to peeling to breaking, a seal material that is a poor fit for an application can lead to many issues down the road. Seal material has a long-term effect on an application’s capabilities.
What Does High Elasticity Mean?
The term high elasticity is known as the ability of an object to return to its shape once it no longer is attached to its source of stress. Rubber compounds represent a wide collection of materials—known as elastomers—which includes base elastomer, vulcanization agents, fillers and plasticizers, with their main feature being high elasticity. Therefore, rubber is widely considered the best seal material. Questions to consider when selecting the seal material for an application include:
Will this application be exposed to water, oil, gas, harsh chemicals or other materials?
What are the minimum and maximum temperature resistances?
What is the required compression strength?
Will this application be exposed to sunlight for hours at a time?
Whether you are choosing Buna (Nitrile), EPDM or Viton, it is important to compare and consider all key features and benefits.
Read more: Seal Selection Guide: Which Material Is the Right Choice?
