Everytime I open up the door panel , whether it's to replace a window reg, etc - I always replace the vapor barrier and use good butyl.

I must be slipping as the car was out of the garage in the nonstop 36+ hr rain we had and both front and rear DS is wet. Front more / rear, just primarily along where the door meets the body.

I always use a new VB as I ain't got the time to fug with repurposing the VB. In the last 28 months, I def have opened up these 2 panels.