The failure in tension of polyamide-11 solvent-welded joints has been studied, with a special emphasis on the effect of predrying the adhesive at 40-degrees-C before mating. During the initial 30 minutes of predrying the fracture strength increased to a maximum value. Thereafter, the fracture stress decreased toward an equilibrium value. This general behavior occurred with notched and unnotched tensile specimens. The initial increase in strength is associated with the increase in concentration of polymer at the mating interface. The subsequent decrease in strength is associated with a decrease in the mobility of the polymer molecules at the mating interface as the concentration of solvent at the mating interface decreases by evaporation. It was found that the small amount of polymer that is initially dissolved in the adhesive has no effect on the fracture stress or its relationship to predrying time. It is concluded that polymer is dissolved in the adhesive in order to adjust its viscosity so that it can be conveniently applied to the surface.