Thermal and non-thermal emission of SN 2018ibb. Less than a few percent of the total radiated energy is emitted in the radio and X-rays. The luminosity limits lie in the ballpark of non-detections of other SLSNe, and they are a factor of 50 larger than the luminosity of the four H-poor SLSNe with either radio or X-ray detection. The limits of SN 2018ibb are larger than the most luminous radio and X-ray SNe.