Nonhazardous & nontoxic--does not contain ethylene glycol; Nonfreezing, viscous, fluorescent, bubble-type ;gas-leak detector; Leaks appear as large, strong bubbles that cling to surface & are fluorescent under black light; For use on hot & cold piping & on equipment ;containing most gases--air, natural gas & all refrigerants (R-12, R-134A, R-22, R-502, etc.), ;ammonia, sulfur dioxide, etc.; Rated to 27deg F; 32oz trigger sprayer bottle;