This supporting information provides the results of the ultrasonic measurements used in this study that correspond to the graphical data presented in Figure 1, 2 and 8 of the main article. This supporting information includes: (1) the ultrasonic P- and S-wave velocities of the pore filling material, octadecane, as a function of temperature at ambient pressure as plotted in Figure 1; (2) the ultrasonic P- and S-wave velocities of the the dry, liquid- and solid-octadecane saturated Bentheim sandstone measured in the pressure range of 0-35 MPa as plotted in Figure 2; (3) the bulk and shear moduli of the dry, liquid- and solid-octadecane saturated Bentheim sandstone as plotted in Figure 8.