closed cell foam

noun

variants or closed-cell foam

plural closed cell foams or closed-cell foams

: a stiff, dense foam (see foam entry 1 sense 1c) resulting from the introduction of gas bubbles during manufacturing in which the air bubbles are completely enclosed and not connected to surrounding air bubbles

In closed cell foam, the air bubbles are completely encapsulated, for a harder and denser foam with higher insulation value.

—Alden Wicker

Closed-cell foam is denser and restricts airflow, making it ideal for insulating homes or buildings.

—Lilliana Winkworth

The closed cell foam insulation allows for two to three days of ice retention.

—Travis Smola

Word History

First Known Use

1955, in the meaning defined above