When designing any payload or instrument the selection of materials is most critical to ensure that material degradation or failure does not comprise the mission objectives. Material failure not only means physical failure of the material but also deleterious outgassing that may induce contamination to one self and/or others in close proximity. In addition to spacecraft material selection, T & M Engineering offers ASTM E1559 testing, required for all non-metallic materials to be flown on the International Space Station.