I guess they need Cosmic Certified Locktite. $50k per tube.
I know you are joking, but you aren't far off, because the heat variations that will occur on that machine will be very wide. And there will be no room for error. So even if it costs $2 per tube to make, the R&D will be incredibly high for probably a one gallon production run.
I support material requirements for some aviation repair facilities and everything cost more- a lot more. Why? Because very strict performance standards with very limited production runs.