A seal between a base structure and a slide out structure of a recreational vehicle includes a panel section mounted to the base structure, the panel section including a front edge, a rear edge, a first side and a second side. A sealing element extends from the panel section, between the front edge and the rear edge, in a direction from the first side toward the second side of the panel section, the sealing element extending to contact the slide out structure and wipe moisture therefrom upon relative movement of the slide out structure and base structure. A catch flange extends upwardly from the rear edge of the panel section. A first side basin detail extends from the first side of the panel section, and a second side basin detail extends from the second side of the panel section. The catch flange, the first side basin detail and the second side basin detail define a water catch that is open at the front edge of the panel section, the water catch collecting moisture wiped from the slide out structure by the sealing element.