K140 is typically treated as a cationic grade defined by binder content, viscosity range, storage stability, sieve residue, particle charge, and residue properties after evaporation. Recommended uses commonly include road maintenance operations that need controlled breaking and reliable adhesion, but exact applications depend on the national or client specification that defines K140. Buyers should not rely on the name alone. Request the governing standard reference, test methods, and typical field application scenarios from the supplier. Confirm recommended spray temperature, nozzle selection, and target residual binder rate through calibration and small trials before full deployment.