puncture-sealing tire

puncture-sealing tire

[¦pəŋk·chər ‚sēl·iŋ ′tīr]
(engineering)
A tire whose interior surface is coated with a plastic material that is forced into a puncture by high-pressure air inside the tire and subsequently hardens to seal the puncture.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.