FORMIC ACID Resistant O-Rings and Seals

Formic acid, also known as methanoic acid, is a colorless liquid with a distinct odor. It is a widely used industrial chemical, used as a preservative in livestock feed and as an intermediate in the production of other chemicals. Common uses of formic acid include dye manufacturing, leather tanning, rubber processing, and as a pH adjuster in water treatment.

Common types of failures when rubber is exposed to formic acid include swelling, hardening, cracking, and discoloration. Prolonged exposure to formic acid can cause the rubber to become hard and brittle, leading to brittleness and cracking upon mechanical stress. Additionally, formic acid can cause the rubber to swell, leading to eventual breakdown and degradation. Formic acid may also cause the rubber to become sticky, leading to adhesion and sticking to other surfaces, as well as discoloration.


EPDM (EP, EPR, Ethylene-Propylene Rubber)

EPDM o-rings, or ethylene propylene o-rings, are a family of synthetic elastomers with lower cost steam and chemical resistance, particularly for applications involving solvents, acids and other mild chemicals. Marco Rubber has the world’s largest inventory network of EPDM o-rings and made on demand custom manufacturing often without tooling fees, so the EPDM o-rings you need are always available. Whether it’s for water systems, braking systems, medical, pharmaceutical, food or dairy use, you can count on Marco Rubber to deliver your o-rings fast and efficiently.

Common Names: EPDM, Ethylene Propylene Diene Monomer Rubber


Here are just a few of the products we have available. Buy online or submit a quote for a fast response.
Recommended Material:
E1055 EPDM
Low Temp
-65 °F (-55 °C)
High Temp
300°F (150 °C)
Base Material
EPDM (EP, EPR, Ethylene-Propylene Rubber)
Hardness
70
Color
Black
Attributes
  • Peroxide cured
Datasheet
Recommended Material:
E1000 EPDM
Low Temp
-65 °F (-55 °C)
High Temp
300°F (150 °C)
Base Material
EPDM (EP, EPR, Ethylene-Propylene Rubber)
Hardness
70
Color
Black
Attributes
  • Compliant to FDA specification 21 CFR 177.2600 for use in food and beverage contact applications
  • Certified to NSF 61 specification for use in drinking water applications
  • Peroxide cured
Datasheet
Recommended Material:
E1006 EPDM
Low Temp
-45 °F (-45 °C)
High Temp
300°F (150 °C)
Base Material
EPDM (EP, EPR, Ethylene-Propylene Rubber)
Hardness
50
Color
Black
Attributes
  • Low durometer material
  • Peroxide cured
Datasheet

Rubber Material Compatibility with FORMIC ACID

View some of our other material compatibility ratings with FORMIC ACID. 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