QuikClot is made of standard gauze impregnated with kaolin, an inorganic mineral found naturally in clay. Kaolin is the active ingredient across the entire QuikClot product line, from the Combat Gauze used by the military to the civilian versions sold for first aid kits. The mineral doesn’t seal a wound on its own. Instead, it jumpstarts your body’s natural clotting process, cutting down the time it takes for bleeding to stop.
How Kaolin Triggers Clotting
When blood comes into contact with kaolin, a protein in your blood called Factor XII changes shape. That shape change sets off a chain reaction known as the clotting cascade, a sequence of protein activations that ultimately builds a stable blood clot at the wound site. Specifically, activated Factor XII triggers another clotting protein (Factor XI), which triggers the next one in line, and so on, until a mesh of fibrin forms to plug the bleeding.
This isn’t a reaction unique to kaolin. Silicate minerals, including clays and glass, all carry a negative surface charge that activates Factor XII on contact. Research published in Blood Advances confirmed that the clotting power of various silicate-containing materials could be predicted by their surface concentration of silicon. Kaolin happens to be an especially effective and well-tolerated version of this principle, which is why it was chosen for a medical product.
The key distinction: QuikClot doesn’t introduce any synthetic chemical into the wound. It accelerates a process your blood already performs, just faster than your body could manage on its own during heavy bleeding.
What the Gauze Itself Looks Like
The kaolin is bonded to a nonwoven fabric, not loose powder. Early versions of QuikClot (pre-2008) used a granular zeolite mineral that was poured directly into wounds and generated significant heat, sometimes causing burns. The switch to kaolin-impregnated gauze eliminated that problem entirely. Modern QuikClot produces no exothermic reaction.
The product comes in several formats depending on the intended use. Military Combat Gauze is typically a Z-folded strip (3 inches by 4 yards or 4 inches by 4 yards) designed to be packed tightly into deep wounds. Civilian and EMS versions include smaller squares (2×2 inch, 4×4 inch), larger trauma pads (12×12 inch), and even small round formats under an inch across for dental or minor surgical bleeding. All of them use the same kaolin technology on the same type of nonwoven material.
Safety and Biocompatibility
QuikClot has been cleared by the FDA after extensive biocompatibility testing under ISO 10993 standards, the international benchmark for evaluating medical devices that contact human tissue. Testing covered cytotoxicity (whether it kills cells), irritation, sensitization (allergic potential), genotoxicity (DNA damage risk), and even carcinogenicity screening. A six-month animal survival study specifically evaluated repeated kaolin exposure, and separate tests checked whether kaolin could migrate into surrounding tissue or enter the bloodstream.
One finding worth noting: adhesion formation (internal scarring where tissues stick together) was observed in preclinical animal studies when QuikClot was used in body cavities. However, adhesions also occurred with control materials, and it remains unclear whether QuikClot causes more adhesion than standard gauze. For external wound packing, which is the primary intended use, this is less of a concern.
How It Performs in Practice
A systematic review in BMJ Military Health found that hemostatic dressings, including QuikClot Combat Gauze, achieved survival rates between 79% and 93% across multiple studies of severe prehospital bleeding. In head-to-head preclinical comparisons against other hemostatic products like Celox (which uses chitosan, a shellfish-derived compound) and HemCon, QuikClot Combat Gauze performed competitively. Across four studies that tested all three products directly, QuikClot and Celox traded victories evenly, each coming out on top twice, while HemCon did not win any.
The practical application is straightforward. You open the package, pack the gauze directly into the wound at the bleeding source, and hold firm pressure for at least three minutes. More than one dressing can be used if the wound is large. Once bleeding stops, a pressure bandage goes over the top. The gauze should not be removed to check the wound, since that risks disrupting the clot that just formed.
Why Kaolin Replaced Zeolite
The original QuikClot products used zeolite, a volcanic mineral that absorbed water from blood so aggressively it generated temperatures high enough to cause second-degree burns in surrounding tissue. It also came as a loose granular powder that was difficult to control in windy conditions and hard to remove from wounds during surgery. Kaolin solved both problems. It activates clotting through a different mechanism (contact activation rather than water absorption), produces no heat, and stays bonded to the gauze fabric so surgeons can remove it cleanly.
This is why you’ll sometimes see older references warning about QuikClot burns. Those warnings apply to the pre-2008 zeolite formula, not to any current product. Every QuikClot product manufactured today uses kaolin-impregnated gauze.