The influence of $H_{3}BO_3$ on the hydration of calcium sulfoaluminate and calcium aluminate phases was investigated. The addition of $H_{3}BO_3$ affected the solubility and the dissolution rate of calcium sulfoaluminate and calcium aluminate particles. In particular, the Al ion concentration was shown to be very low in the $H_{3}BO_3$ solution. The gelatinous products were also observed when the solution of calcium aluminate was reacted with $H_{3}BO_3$ solution. These gelatinous products were constituted by the basic Al ions with incorporated B ions and great quantity of water. Overall, these gelatinous products form the impermeable layer on the surface of the particles of calcium sulfoaluminate and calcium aluminate particles, and interrupt the diffusion process of the other ions, e.g. $Ca^{2+};and;SO_4^{2-}$.