Densities and viscosities of 1,8-cineole and of binary mixtures of thymol (1) + 1,8-cineole (2) were measured in the concentration range x1 = 0.58-0.71 for temperatures between 278.15 and 298.15 K. Excess molar volumes derived from the experimental density data are negative at all temperatures and compositions and were fitted to a Redlich-Kister-type equation. The McAllister method was used to correlate the kinematic viscosities.