It does take some time for the seal to conform. It helps to lay the seal in the sun for a short time to soften it up before installation. As Bob stated, the seal must have weatherstrip adhesive applied for it to work. Also clean the channel of the old seal and adhesive before installation.
Originally Posted By Bob S.
I try not to get my car wet.
Like going to the Doctor, and saying "it hurts when I do this." The Doc wil say, "well, don't do that."