water-tight
Adjective
Meaning
So tight as to retain, or not to admit, water; not leaky.
Source: Webster's dictionaryExamples
Cooling Annualized geo solar buildings often have buried, sloped water-tight skirts of insulation that extend convert from the foundations, to prevent heat leakage between the earth used as thermal mass, and the surface.
Often a gasket is provided to provide a water-tight seal to the panel and the front of the LCD will be sealed to the back of the front panel to prevent water and dirt contamination.
Retting can also be done in a plastic trash can or any type of water-tight container of wood, concrete, earthenware, or plastic.
Watertight above-water platforms with sections protected by water-tight bulkheads can prevent sinking if the hulls fail.