Stearic acid is also known as Octadecanoic acid and is a naturally occurring saturated fatty acid. It is commonly used in the production of soaps, cosmetics, and lubricants, as well as in the food industry as an emulsifier.
When exposed to stearic acid, rubber can become softened and swollen, leading to a decrease in its physical strength. The rubber may also become sticky and tacky, making it difficult to handle and increasing its risk of tearing or ripping. Additionally, it can become very brittle and prone to cracking at low temperatures, and may also become more susceptible to degradation from UV exposure. The risk of failure is highest at higher concentrations of stearic acid, as the rubber will be more affected by its properties.
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.
View some of our other material compatibility ratings with STEARIC 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