👉 An admit fluid, also known as an admixture fluid or admixture, is a liquid substance added to a fluid medium, such as water, to modify its physical properties for specific industrial or engineering applications. This fluid typically serves to enhance characteristics like viscosity, surface tension, thermal stability, or chemical resistance. In processes such as coating, drilling, and heat treatment, the admit fluid plays a crucial role in ensuring uniformity, improving adhesion, reducing friction, and preventing corrosion. By adjusting the fluid's properties, engineers can tailor the final product to meet precise requirements, making admit fluids indispensable in various manufacturing and construction processes.