Behavior marked by a decrease in viscosity with an increase of the shear stress or the velocity gradient. Unlike plastic behavior, however, there is no flow limit and therefore a lack of initial effort. The fluid behaves as a liquid when resting and it needs a very little effort (almost zero) to move.

Self-levelling resins for floor applications are a typical example of this category.

All glazes for airless applications can be considered pseudo-plastic.

They are nothing but water suspensions of extremely fine vitreous or natural particles. The chemical and physical features of the particles as well as their size make these systems almost do not need flow limit, since the sedimentation of the solid particles during the resting phase is very slow.

The lack of flow limit finally ensures a good and proper levelling during application. The rheological curves of pseudo-plastic and plastic fluids are actually very similar, differing each other only in the presence/lack of flow limit.