Condensation is the process in which water vapor in the air turns into liquid water. This process is important for many things, including the formation of clouds and rain. However, condensation is not typically used by cells to seal tissues tight. Instead, cells use a variety of other mechanisms to seal tissues tight, including:

* Tight junctions: Tight junctions are specialized protein complexes that form between the cells of epithelial tissues. Tight junctions create a barrier that prevents water and solutes from leaking between cells.

* Adhesion molecules: Adhesion molecules are proteins that bind to each other on the surfaces of cells. Adhesion molecules help to hold cells together and prevent them from separating.

* Desmosomes: Desmosomes are specialized cell-cell junctions that are found in tissues that experience a lot of mechanical stress, such as skin and muscle. Desmosomes help to hold cells together and prevent them from pulling apart.

These are just a few of the mechanisms that cells use to seal tissues tight. By preventing water and solutes from leaking between cells, these mechanisms help to maintain the proper functioning of tissues and organs.