The black rubber seal on the car side of the door opening? I just use the black sensor safe gasket maker. Forms a tough rubber that is resistant to most chemicals and weather. Clean the area with alcohol to remove oils, put the glue over the rip/hole and lay a bit of wax paper over it, shut door. Peel off wax paper a day later and then spray the area with silicone spray to lubricate.
Another bonus is it's black, so it blends.
Performance one step at a time.