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Open cell foam, custom manufactured and die cut by American Flexible Products.

Many products require foam, but there are many kinds available. A couple of the most popular options include open cell and closed cell foams, and for good reason. Both are powerful materials that can help improve performance and functionality, but which one is right for you? Here’s a quick overview.

What is the Difference Between Open and Closed Cell Foam?

There are a number of differences. Open cell foam utilizes cells that are not completely enclosed by their walls and open to the surface. In contrast, closed cell foam features cells that are fully enclosed by walls without connecting to other cells.

Each type of foam comes with its own performance advantages and some products feature a blend of open and closed cell material. Here’s a quick look at the traits of each style:

Open Cell Foam Characteristics

  • Resists compression set and force relaxation
  • At a certain compression level, the small openings in the cell walls close off, which can create an effective seal
  • Used for thermal insulation, filters, acoustic absorption, shock/vibration management, and cushioning

Closed Cell Foam Characteristics

  • Resists water absorption in an uncompressed state (Open cells in an uncompressed state can be infiltrated by liquids and gases)
  • Contains pockets of gas enclosed in an elastomeric shell (When uncompressed)
  • Commonly used for gasketing requiring a watertight seal

Get Your Free Quote on Open Cell and/or Closed Cell Foam

American Flexible Products is a nationwide converter of flexible materials—from foam to rubber to silicone and more. Every product is custom-cut and shaped to your design specs by our materials engineers.

We are an official Preferred Converter of products from Rogers Corporation, making AFP a great choice for your custom fabricated parts made of Rogers’ BISCO Silicones.

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