Insulation
Insulation was a lining used to maintain the temperature or environment of an area.

Trellium-D was primarily used as insulation for interstellar vessels. () When traveling through the Delphic Expanse, ships that were not insulated like this could suffer damage from spatial distortions. () 's outer hull was lined with duranium. ()

As part of an answer to a 2151 "poop question" posed by Molly McCook,  mentioned that waste was turned into useful items for their ship, including insulation. ()

See also 
 Biothermal insulation
Technology