Superabsorbent resins prevent water leakage and evaporation due to their ability to trap and hold large amounts of water within their polymer network. Once the resin absorbs water, it forms a gel-like structure that locks the water in place, preventing it from flowing or leaking. This gel also minimizes surface exposure, reducing the rate of water evaporation by limiting the amount of water that can escape into the air. The cross-linked polymer structure ensures the absorbed water stays contained for extended periods.