a radiographic imaging detector has photoimaging pixels disposed in an array , control electronics for controlling operation of the array to capture radiographic images , and a voltage source for powering the array of photoimaging pixels and the control electronics . a housing with multiple parts encloses at least the array and the control electronics and provides a seating for the voltage source . a first part has a first mating surface , a second part has a second mating surface . the first and second mating surfaces are disposed adjacent to each other and define a gap therebetween with a hydrophobic material deposited along at least one of the first and second mating surfaces .