During the sixties of last century traditional cable lacing was done using a thin cord, traditionally made of waxed linen. The wax should improve knot retention. enter image description here

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From NASA-STD-8739-4.

Using waxed tape or cord is forbidden now:

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From NASA workmanship standards Released: 04.05.2002.

There is now braided fiberglass lacing tape (A-A-52083 MIL- T-43435) with silicone finish for improved knot retention made from fireproof materials, see

But when was the usage of waxed lacing forbidden for spaceflight applications?

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    $\begingroup$ To help bound it: it was ok for (unmanned) payload in 1981. It was not ok in the early 2000’s, perhaps 2004. $\endgroup$ – Bob Jacobsen Sep 23 '19 at 18:54
  • $\begingroup$ @BobJacobsen the workmanship standards were released 2002, so it was forbidden in 2004. $\endgroup$ – Uwe Sep 23 '19 at 19:24
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    $\begingroup$ I would guess that out-gassing is the issue. $\endgroup$ – Rikki-Tikki-Tavi Sep 24 '19 at 11:02

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