Hydrogel is a water-based extinguishing agent made from modified natural clay and water that suppresses fires through temperature-sensitive gel formation. When it contacts heat, it transforms from a low-viscosity fluid into a thick, adhesive layer that clings to burning surfaces, concentrating cooling exactly where it is needed. Unlike conventional agents, it also addresses gas release and chemical instability, making it particularly effective against lithium-ion battery fires, which standard water and foam agents struggle to fully control. The sections below answer the most common questions about how hydrogel fire suppression works, where it applies, and why it is gaining traction across industrial and commercial fire safety.<\/p>\n
Hydrogel extinguishes fires through four simultaneous mechanisms: rapid cooling, physical flame isolation, gas suppression, and chemical stabilisation. Its high water content absorbs heat quickly, while its clay-based structure thickens under rising temperatures and adheres to hot surfaces, creating a persistent cooling layer that water alone cannot maintain. This combination allows hydrogel to attack a fire at every stage of its development rather than simply knocking down visible flames.<\/p>\n
The cooling phase begins immediately on application. As the fluid contacts heat, it gels and expands slightly, improving surface contact and accelerating heat dissipation. This is particularly important for lithium-ion battery fires, where residual heat deep inside battery cells can sustain thermal activity long after visible flames are gone.<\/p>\n
At the same time, the gel layer forms a physical barrier that restricts oxygen from reaching the fire and separates escaping flammable gases from potential ignition sources. For lithium-ion batteries, this matters because gas release can continue even after flames appear controlled, and any re-exposure to an ignition source can trigger re-ignition or a fresh thermal runaway event.<\/p>\n
The clay particles within the gel also penetrate damaged battery structures and bind reactive lithium ions, reducing the chemical reactivity that drives continued instability. This is what sets hydrogel fire suppression<\/a> apart from purely thermal approaches: it addresses the underlying chemistry, not just the surface fire.<\/p>\n Discuss your application<\/a>\n<\/div>\n The key difference between hydrogel and conventional water or foam agents is persistence. Water runs off hot surfaces quickly, reducing its cooling efficiency and often requiring large volumes to achieve suppression. Foam agents provide a surface barrier but do not cool as effectively and frequently contain PFAS compounds that carry significant environmental and regulatory risks. Hydrogel combines the cooling strength of water with an adhesive, thermally responsive structure that stays in contact with the fire source far longer.<\/p>\n In practical terms, this means less extinguishing agent is needed to achieve the same or better result, which reduces runoff, limits environmental contamination, and lowers the volume of waste to manage after an incident. For lithium-ion battery fires specifically, where thermal activity persists beneath the surface, the sustained adhesion of hydrogel provides a meaningful advantage over agents that drain away.<\/p>\n Hydrogel also neutralises certain hazardous gases that battery fires produce. Lithium-ion cells can release hydrogen, methane, and hydrogen fluoride during thermal runaway. Hydrogel interacts with hydrogen fluoride and converts it into less harmful ionic components, a capability that neither water nor most foam agents offer. This gas-suppression function reduces atmospheric hazards for anyone near the incident, though it does not eliminate exposure risk entirely, and appropriate respiratory protection remains essential.<\/p>\n On the environmental side, hydrogel contains zero PFAS, consists of more than 99% natural components, and carries a carbon footprint of less than 0.7%. When its service life ends, typically after more than ten years, the material is expected to be recyclable as a compost-enrichment supplement. No equivalent end-of-life pathway exists for most foam-based agents.<\/p>\n Hydrogel is rated for Class A, Class B, and Class F fires, covering solid combustibles, flammable liquids, and cooking oils respectively. Beyond these standard fire classes, it is specifically engineered for lithium-ion battery fires, a category that conventional classification systems do not fully address and that standard agents often fail to control adequately.<\/p>\n Class A coverage includes wood, paper, textiles, and plastics, the most common fire type in buildings, warehouses, and industrial environments. The gel’s adhesion to vertical surfaces and its sustained cooling make it effective even on structural fires where water would run off before transferring sufficient heat away.<\/p>\n For Class B fires involving flammable liquids, hydrogel floats on non-polar fuels and fats, forming a suppressive layer that restricts vapour release and limits re-ignition. Class F coverage addresses cooking oil fires, which burn at extremely high temperatures and are prone to violent re-ignition if cooled too rapidly with plain water.<\/p>\n Lithium-ion battery fires represent the most technically demanding application. These incidents involve thermal runaway, a self-sustaining chain reaction where heat from one failing cell triggers adjacent cells, releasing flammable and toxic gases and generating temperatures that overwhelm most conventional agents. Hydrogel’s combination of sustained cooling, physical insulation, gas neutralisation, and lithium-ion stabilisation addresses the full fire lifecycle rather than just the visible flame stage. The thermal runaway blocker<\/a> application of hydrogel is designed specifically to interrupt this chain reaction and prevent it from propagating through a battery pack.<\/p>\n Hydrogel is classified as non-dangerous for humans and the environment under the most stringent European chemical legislation. It contains no PFAS, consists of more than 99% natural components derived from modified clay and water, and has been tested for aquatic toxicity against algae and daphnia according to OECD guidelines, confirming it is non-toxic to aquatic life. When used correctly, it produces water vapour as a by-product of the cooling process, with no toxic combustion products from the agent itself.<\/p>\n For operators applying hydrogel to a live fire, standard safety precautions still apply. Lithium-ion battery fires release hazardous gases including hydrogen fluoride regardless of the extinguishing agent used. Hydrogel reduces the concentration of these gases and interacts with hydrogen fluoride to convert it into less harmful compounds, but it does not eliminate exposure risk. Respiratory protection and a safe working distance remain necessary during any battery fire intervention.<\/p>\n From an environmental standpoint, hydrogel’s profile is strong. Because it adheres to surfaces longer than water, less agent is needed per incident, which means less contaminated runoff entering drainage systems or soil. After use, residual hydrogel can be removed by absorbing excess material and rinsing with water. The material itself can be collected and recycled, with its clay components potentially suitable for reuse as compost enhancers. This end-of-life recyclability makes it one of the few extinguishing agents with a genuinely circular lifecycle.<\/p>\n Yes. Hydrogel is fully interchangeable with water and can be used in all water-based fire suppression systems without requiring infrastructure modifications. This means sprinkler systems, fixed suppression installations, and handheld extinguishers that currently use water can be adapted to use hydrogel without replacing pipework, nozzles, or storage tanks. The compatibility with existing infrastructure significantly reduces the cost and complexity of upgrading to a higher-performance agent.<\/p>\n Despite being over 95% water by composition, hydrogel can also be safely applied to electrical equipment rated up to 1,000 V when used with appropriate nozzle configurations, an important consideration for data centres, EV charging infrastructure, and industrial facilities where electrical hazards are present alongside fire risk.<\/p>\n For fixed fire suppression systems<\/a>, hydrogel’s compatibility with standard water-based infrastructure means that facilities managing lithium-ion battery storage, warehouses, energy storage installations, recycling facilities, can upgrade their suppression capability without a full system overhaul. For portable applications, handheld hydrogel extinguishers<\/a> are available for first-response use in environments where a fixed system may not cover every risk zone.<\/p>\n Hydrogel has a service life of more than ten years, meaning systems charged with the agent do not require early replacement for technical or performance reasons. When replacement is eventually needed, the agent can be discharged safely given its ECO-safe classification.<\/p>\nWhat makes hydrogel different from water and foam agents?<\/h2>\n
What types of fires can hydrogel suppress?<\/h2>\n
Is hydrogel safe for people and the environment?<\/h2>\n
Can hydrogel be used in existing fire suppression systems?<\/h2>\n