Thermal concrete was a material composed mostly of silicon, used by Starfleet in the 23rd century in the construction of emergency shelters.
In 2267, Doctor McCoy used one hundred pounds of thermal concrete to bandage a wound on the silicon-based lifeform known as a "Horta". (TOS: "The Devil in the Dark")
In James Blish's novelization of the episode in Star Trek 4, which was generally based moreso on early draft scripts than final drafts, states that McCoy only used ten pounds of concrete.
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.