INDOLE Resistant O-Rings and Seals

Indole, also known as indigotin, is a naturally occurring aromatic hydrocarbon found in many plants, including those used for dyeing and flavoring food. It is also used in the production of pharmaceuticals, insecticides, and industrial chemicals.

When rubber is exposed to indole, common types of failure include discoloration, swelling, and softening. Discoloration occurs as a result of the indole's ability to break down the rubber's molecules, resulting in a change in color. Swelling occurs due to the indole's solubility in water, which causes the rubber to absorb the water and expand. Lastly, softening occurs due to the indole's ability to reduce the rubber's surface tension, causing it to become soft and pliable.


FKM (Viton®)

Viton ® o-rings from Marco Rubber offer excellent compatibility with a range of chemicals, oils and resist high temperatures up to 400F. Viton ® is also known as FKM made of fluoroelastomer one of the most versatile and widely used sealing materials.

Common Names: FKM, FPM (Europe), Fluoropolymer, Fluoroelastomer


Here are just a few of the products we have available. Buy online or submit a quote for a fast response.
Recommended Material:
V1000 FKM
Low Temp
-15 °F (-30 °C)
High Temp
400°F (205 °C)
Base Material
FKM (Viton®)
Hardness
75
Color
Black
Attributes
  • General purpose material
Datasheet
Recommended Material:
V1003 FKM
Low Temp
-15 °F (-30 °C)
High Temp
400°F (205 °C)
Base Material
FKM (Viton®)
Hardness
75
Color
Brown
Attributes
  • General purpose material
Datasheet
Recommended Material:
V1007 FKM
Low Temp
-15 °F (-30 °C)
High Temp
400°F (205 °C)
Base Material
FKM (Viton®)
Hardness
90
Color
Black
Attributes
  • For higher pressure applications
Datasheet

Rubber Material Compatibility with INDOLE

View some of our other material compatibility ratings with INDOLE. If you don't see what you're looking for or need more guidance, our team of experienced sealing design engineers can help select the best sealing products and material for your specific application.

View Full Chemical Compatibility Guide
Connect with an Expert
  • Trusted by 14,000+ customers/companies
  • Same day shipping is available for many of the sealing products in our inventory
  • 3,000+ custom sealing material formulations
  • Most quotes delivered in less than an hour
  • Expert application assistance available