Lactones are cyclic esters derived from lactic acid. Common names for lactones include gamma-butyrolactone, gamma-valerolactone, and gamma-caprolactone. Common uses for lactones include solvents, plasticizers, surfactants, and fuel additives.
When rubber is exposed to lactones, it can cause swelling, shrinkage, cracking, and discoloration. Swelling of the rubber can reduce its dimensional stability and make it more susceptible to cracking. Shrinking and discoloration can also cause the rubber to become brittle and degrade. Additionally, exposure to lactones can cause the rubber to react with other chemicals and increase the rate of chemical degradation.
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 LACTONES. 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