Not sikaflax, but the same stuff i used to bond the kit to the car. As i use a trolly jack i have never removed the covers on any of the cars i have owned.That is what i will be doing Martin the pessimist in says they will deny any wrong doing.I have just fitted skirts to mine and i bonded the jacking point covers in place.
It's a pig that they have broke yours as they are not cheap to buy and then having to paint them to.
What did you use Sikaflex ? thats what i used to bond the skirts in place.