sponge rubber

American  

noun

1. a light, spongy rubber, usually prepared by bubbling carbon dioxide through or whipping air into latex, used for padding, insulation, gaskets, etc.; foam rubber.

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Etymology

Origin of sponge rubber

First recorded in 1885–90

Example Sentences

Sponge rubber balls changing color.

From Seattle Times

Resembling a deerstalker hat, it had three peaks, two of which covered the ears and temples on either side of the head and were lined with sponge rubber.

From BBC

Wash for pages; wash for book covers; powdered pumice stone; art gum, sponge rubber.

From Project Gutenberg

Occasional use is found for various other materials, such as powdered pumice stone, sponge rubber, India rubber erasers and art gum.

From Project Gutenberg

A red rubber or a sponge rubber is much better than an India rubber eraser.

From Project Gutenberg