It is used in hot and cold application. We provide OEM service ... non-caustic gel pack can be used as a hot or cold compress: 1)To warm, place pack ... until desired temperature is achieved.Or cover pack completely with hot water and soak for 3 - 5 minutes. 2)To ... , heatstroke, itch, headache, strain, scald and fatigue b). Hot compress: alleviate rheumatic pain, neural pain, sciatica, vertebral, pain ...