Curing of glue made from liquefied wood was researched. Spruce wood was heat treated at different temperatures (150, 170, 190, 210 and 230 °C) and glued using liquefied wood. The measurements were made with Ares G2 rheometer. Instead of standard aluminium discs, wooden discs made with CNC machine and circular saw were used. The oscillation test with the ŽmultiwaveŽ measurement technique was done. Discs from non-modified and thermally modified wood were prepared and air-conditioned at 65 % relative air humidity at 20 °C. The thermally modified wood was exposed to different values of relative air humidity. Based on measurements, it was concluded, that glue from liquefied wood needed more time for gelling than non-modified wood. The gelling time was shorter when using modified wood. The point of cross-link appeared at the same time at non-modified and modified wood. It means that the modification state does not influence the cross-linking of glue from liquefied wood. Humidity of wood has higher influence on glue so as the percentage of volatile able components in the glue from liquefied wood, meaning that the higher the humidity of wood takes longer to cross-link.