Borate Solution 2 : A slurry formerly use as an extinguishing agent on wildland fires or as a retardant on fuel in the path of the fire, usually on wildland fires
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}