i would if I knew the solution but I don't. All I know is that my van appears to be dry when it rains. The vauxhall garage could find nothing apart from the leaves. Other work they did like seal up a hole where a cable had been run through made no difference. They could find no leak around the brake servo and I had originally tried pouring water over this area and none got through. However they resealed it just in case. However I cannot say for certain if it is permanently cured or if it's just a fluke as hasn't rained that many times since Ive had van back and hosing it down does not cause a leak at the moment, although it did do before. Hope that is enough for you, cannot tell you anything more.