Waterproof and sealing methods during stone installation

During the installation process of stone, it is necessary to ensure the true natural color of the surface, without pollution, and to have certain waterproof measures. Currently, there are three methods for installing and sealing stone materials:
1. The gap is not sealed with sealant, and air convection is formed on the back of the stone to exhaust water vapor from the outside, preventing the formation of temperature differences on the surface of the stone and preventing the formation of condensed water on the inner surface of the stone.
2. Half seam sealing is to maintain the position of the external facade without sealant, which has a good three-dimensional feeling. In fact, the adhesive layer is hidden inside the nodes, but it must be ensured that the thickness of the sealant should be around 6mm, but it cannot exceed the width. The width should be calculated and determined based on the quality of the adhesive. 
3. Use neutral sealing silicone adhesive, which is a special adhesive for stones, to seal all the joints on the outer facade. Rainwater from the outer facade cannot enter the back of the stone, leaving the stone in a dry state (except for rain and snow), ensuring that the bending strength and shear strength of the stone remain unchanged.
In addition, when sealing stones, there should be a sense that although stones cannot breathe like humans, they also need to be "breathable" to ensure the survival and reproduction of bacteria inside the stones. Many measures taken during sealing revolve around these two points.
Although stones cannot breathe like humans, they also need to be 'breathable'. Stones are composed of various crystals, which in turn are composed of various minerals. The crystal structure formed by these minerals determines whether the type of stone is marble, limestone, or granite. The integrity of a crystal is closely related to the millions of bacteria inside it, and in addition, the water inside the stone also needs to evaporate through gaps to the outside.