MIL-PRF-027402 is a silicone-based sealant commonly known as MIL-PRF-27402. This sealant is often used in military-grade applications such as sealing aircraft and vehicle components. It is also used for sealing joints in structures, and is an excellent choice for applications that require flexibility and chemical resistance.
When exposed to MIL-PRF-027402, rubber materials may suffer from swelling, cracking, brittleness, and loss of mechanical properties. Swelling occurs when the rubber absorbs too much of the sealant, causing it to expand and become soft. Cracking is caused by the sealant penetrating the rubber, and can cause the rubber to crack or break. Brittleness is caused when the rubber becomes hard and brittle due to the sealant penetrating it. Additionally, the mechanical properties of the rubber may be decreased due to the swelling and cracking that can occur when exposed to the sealant.
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 MIL0P027402. 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