00:23:30 - 00:25:02 Projects
One of the things about bonding in non-porous materials is that it's very, very important that no contamination exists on the surface. You probably will recall that the space vehicle has a problem with tiles, heat tiles that are mostly on the bottom of the ship, coming off. While I do not know, personally, what those actually---what was wrong with them and why they fell off, but I have a very high suspicion that they became contaminated because whoever worked with them had rubber gloves that picked up some debris of some sort and it doesn't take any more than the oil in your fingers, just touch to the surface, and chances are that will not bond. So it is very, very important that surface be protected. It does not seem to make much difference exposing the surface to [inaudible] whether it is dust and whatnot going on, but oil especially is bad for it.