Back mounted stuff.

[Tarmunora]

Metal foam thrower, like the GLOO gun from Prey. You can do something similar with a flamethrower, using a nitro precursor to make heat produce the final reagent for the foam, but it's clunky and might not work with the new fluids mechanic. Just a back-mounted tank + a flamer-sized 'gun' that shoots out small metal foam 'explosions' to patch hull breaches and stuff.