What is the Difference between Open and Closed Cell Foam?

Choosing the right type of Foam Gasket for your Application

Foam Die-Cutting Services

Open and closed cell foam gaskets have many uses across a variety of industries, and both have distinct properties. Open-cell foam is softer, because the cell walls are broken. This allows air to fill the extra space in the material. Compared to closed-cell foam which is available in varying degrees of hardness. The cell walls are not broken and are filled with gasses, which can support a significant amount of weight.

Open-Cell Foam

To be defined as “open-cell”, more than 50% of the foam cells must be broken open. This type of foam is typically lightweight, and available in 5 densities, including:

  • RO11
  • RO12
  • RO13
  • RO14
  • RO15

RO11 is soft, and the RO 15 is extra firm. There are also a variety of open cell sponge rubber gasket materials available. Natural open cell sponge, neoprene open cell sponge and EPDM open cell sponge. Depending your specific applications and requirements, the Kelcut gasket fabrication specialists will create a custom open-cell foam gasket for your application.

Closed-Cell Foam

The majority of cells in closed-cell foam are independent from the surrounded cells, and are not broken. Closed cell foam is much denser and stronger than open-cell foam. In order to be classified as “closed-cell” more than 90% of the cells must be closed. Closed cell sponge rubber gaskets are also available with or without pressure sensitive adhesive backing. These types of cells are often used in the automotive, construction, HVAC and marine industry. Our team of gasket manufacturing specialists can design custom closed cell gaskets for your specific industry application.

Contact the foam gasket manufacturers at Kelcut today.
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