Help I've recently replaced the whole regulator system on the drivers side door I didn't seal it at the time as I didn't know I had to !!!! Now with the heavy rain yes you all probably guessed I've got a serious leakage in the rear passenger well now would this be because of me not sealing the regulator and if so where can I get this butyl rope sealant from ? I've also noticed the water collecting on the sill ? So is this defo the cause of the water in the back ?