GuttaPercha : A tough plastic substance, extracted from the evergreen tree of Malay, that resembles rubber but contains more resin, and is used in insulation
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}