America needs your scrap rubber
Most of the world’s supply of natural rubber came from rubber tree plantations in Southeast Asia, which were quickly occupied by the Japanese in the first months of 1942. Factories converting to military production needed every scrap of rubber they could find, and citizens were asked to turn in old tires, raincoats, gloves, garden hoses, and rubber shoes for recycling. New tires became almost impossible to buy, and people tell stories of lining the insides of their tires with newspaper to make them last longer.
U.S. War Production Board.