Natural rubber was the material of choice for the ball.

Thailand already accounts for more than a third of the world's natural rubber.

This has given rise to a new industry and market for the use of Malaysian natural rubber.

Early automobile tires were made entirely of natural white rubber.

Natural rubber was first used as material for adhesives starting in 1830.

Defense officials, for example, are concerned about the supply of natural rubber, which is used in aircraft tires among many other products.

Tell your doctor if you are allergic to latex or natural rubber.

It is a commodity material which competes with natural rubber.

Next door is the laboratory built for his last major effort: the production of domestic natural rubber, the one project carried out entirely in Florida.

In the early 1920s the supply and demand of natural rubber became a concern in international trade.