3M 2216 A/B Gray is often baselined for space applications as it is, readily available, and well characterized adhesive over temperature, Sundvold, P. D. (1996). Optical Adhesive Property Study (No. KCP--613-5631). Allied-Signal Aerospace Co., Kansas City, MO (United States) , and low outgassing:
sample_id data_ref mfgr_code tml vcm wvr time1 temp1 atm1 time2 temp2 atm2 time3 temp3 atm3 time4 temp4 atm4 appl_code
SCOTCHWELD 2216 A/B GRAY GSC35727 MMM 0.99 0.02 0.21 7D 25 AIR EPOXY
when more compliance is required, RTV-566 is a standard adhesive for space systems, e.g. Mower, T. M. (2018). Thermomechanical behavior of aerospace-grade RTV (silicone adhesive). International Journal of Adhesion and Adhesives, 87, 64–72. https://doi.org/10.1016/j.ijadhadh.2018.08.009