Silane impregnation solution is an environmentally friendly, colorless, odorless, safe and simple to use concrete protective agent. According to the mechanism of catalytic crystallization reaction of active substances, the catalytically active additives are directly loaded on a variety of modified natural materials, which will not have adverse effects on people and the environment. It can penetrate below the surface of the concrete and react chemically with the alkaline substances in the concrete. This reaction produces a composite silica eutectic in the pores and capillary pores, which permanently seals the concrete, enhances the strength and hardness of the new and old concrete, and provides good air permeability to the concrete. It is a comprehensive concrete protectant.