F-500 extinguishers are water-based but use a specialised encapsulator additive that delivers dramatically superior performance. While plain water extinguishers only cool Class A fires (wood, paper, textiles), F-500 units also handle flammable liquids (Class B), cooking oils (Class F), and have demonstrated effectiveness on lithium-ion battery fires—a critical advantage in today's technology-filled world. If your environment contains lithium-ion batteries, flammable liquids,