South Korean scientists have developed a life-saving spray capable of stopping severe bleeding almost instantly, a breakthrough that could transform emergency medicine on battlefields, in ambulances, and in hospitals worldwide.
The next-generation hemostatic spray, created by researchers at the Korea Advanced Institute of Science and Technology (KAIST), turns from powder into a soft, flexible gel the moment it touches blood, sealing wounds in less than a second.
The innovation is aimed primarily at military and emergency medical responders, but its ease of use raises the possibility of future at-home emergency kits, especially in remote or high-risk environments.
Uncontrolled bleeding remains the leading cause of preventable death after traumatic injury, particularly during the first critical minutes following accidents, shootings, or combat injuries. In situations where evacuation to hospital care may take hours, rapid bleeding control can mean the difference between life and death.
According to the researchers, paramedics could apply the spray directly to gunshot wounds, car-crash injuries, deep cuts or fall-related trauma, buying crucial time during patient transport.
The technology, detailed in the journal Advanced Functional Materials, uses a compound known as AGCL, made entirely from natural materials. When sprayed onto a wound, the powder instantly forms a gel that perfectly conforms to deep, uneven or hard-to-reach injuries, creating an immediate seal.
Unlike traditional bandages or gauze, which can struggle in chaotic environments such as battlefields, disaster zones or roadside accidents, the spray rapidly stops blood flow even under extreme conditions.
The AGCL compound combines alginate extracted from brown seaweed, gellan gum produced through bacterial fermentation, and chitosan derived from crustacean and insect shells. Alginate and gellan gum create the gel structure, while chitosan attracts red blood cells and platelets, accelerating clot formation.
Researchers say the gel can absorb up to seven times its own weight in blood, offering protection even in cases of massive haemorrhage. It also has natural antibacterial properties, supports tissue healing, and does not damage surrounding cells.
Another major advantage is durability. The spray can be stored at room temperature for up to two years and remains effective in hot, humid and harsh environments, making it ideal for military deployment.
The stakes are high. Data from the US Centers for Disease Control and Prevention show that around 31,000 Americans die each year from preventable bleeding, while haemorrhage accounts for over 90 per cent of potentially survivable deaths on the battlefield.
“The core of modern welfare is minimising the loss of human life,” said KAIST researcher Kyusoon Park, who worked on the project. “I started this research with a mission to save even one more soldier. I hope this technology will be used both in national defence and civilian medical care.”
KAIST has not yet announced when the bleeding-control spray will be commercially available.
