Niter Cake, also known as Potassium Nitrate, is a solid, odorless and tasteless salt used in a variety of industries. Common uses for Potassium Nitrate include fertilizer, fireworks, and food preservatives.
When exposed to Potassium Nitrate, rubber may be subject to increased brittleness and cracking due to the salt's corrosive properties. The salt can also cause rubber to swell, leading to weak seals and deformations. In addition, the salt's hygroscopic nature can cause the rubber to degrade due to its ability to absorb moisture from the environment.
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 NITER CAKE. 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