stickum - what was it made of?

The yellow goo that wide receivers and defensive backs in the NFL used to be allowed to cover their hands with, and which Lester “The Molester”[sup]1[/sup] Hayes practically bathed in[sup]2[/sup].

What was it, actually?

[sup]1[/sup] - which has to rate as one of the worst sports nicknames of all time.

[sup]2[/sup] - Woody Paige, a Denver sports columnist, once remarked that Hayes was so covered with the stuff that he was probably going to intercept a pass with his helmet some day.