I discovered a small hole, possibly a puncture, in an outer CV gaiter on the front. The hole was right next to/under the (outer) metal ring holding the CV gaiter, so it wasn't in a very flexible bit. There was quite a lot of oily grease splattered on the inside of the wheel (and presumably much of it also went onto the road). The hole was then closed using silicone sealant.
What I would like to know is if the grease that was blown out of the CV gaiter still had a function, or whether grease that has reached the CV gaiter's "wall" is not useful anyway, because it doesn't go anywhere normally. Should the missing grease be replaced?
NB: Given the position of the hole, and the fact that the grease was pushing out, I'm fairly sure that nothing went into the CV gaiter.