Sulfur dioxide is also known as sulfur oxide and is a colorless gas with a strong, pungent odor. It is commonly used in the making of sulfuric acid, bleaching of paper pulp, as a food preservative and in the manufacturing of sulfur-containing chemicals.
When exposed to sulfur dioxide, rubber materials can become brittle and crack due to the sulfur dioxide molecules binding to the rubber’s elastomeric polymers. This can cause the rubber to degrade over time and become brittle. In addition, sulfur dioxide can also cause the rubber to become discolored, swell and become sticky as it reacts with the rubber’s stabilizers. Sulfur dioxide can also corrode the rubber, which can reduce its lifespan.
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.
View some of our other material compatibility ratings with SULFUR DIOXIDE. 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