
...and glued a big-eyed RUBBER alien mask
to the outside of my window.
The Big Bang Theory Season 6, Episode 2

The pencil's RUBBER.
The Big Bang Theory Season 4, Episode 18

It can cut through steel
like it was RUBBER.
The Big Bang Theory Season 2, Episode 12

And RUBBER gloves, air freshener...
The Big Bang Theory Season 8, Episode 19

Uh, aprons and RUBBER gloves are here.
Just scrape, wash and stack.
The Big Bang Theory Season 9, Episode 9