Q: It appears from this question that Apollo missions carried Duct Tape and used it for in-flight fixups. Did they carry the other half of the "Universal Repair Kit" - WD40 (or similar)? If so, was it used?

Answers relating to other crewed space missions also welcome.

Universal Repair Kit: This page and many many other pages on the internet. //

A: It's hard to prove a negative, but the answer seems to be NO.

• It's not in D-7434 Stowage and the Support Team Concept, which has tables by location of the typical inventory stowed in the cabin.

• It's not in D-6737 Crew Provisions and Equipment Susbsystem, which describes in detail each of the items in the cabin.

• It's not listed in the actual stowage manifests by mission.

I searched for the terms oil, wd, and lubrica*. There were plenty of false positives such as screWDriver and fWD. Apollo 17 did carry LUBRICANT,HAND in the commander's suit pocket, but that's not WD-40.

I would be highly surprised to find it onboard. Equipment was designed to avoid in-flight maintenance such as lubrication or waterproofing. An important part of WD-40 is a volatile hydrocarbon which evaporates after application; you don't want that in the cabin air. Also, WD-40 is quite flammable, and after the Apollo 1 fire NASA did everything to avoid combustibles inside the cabin.