Sorry it has taken so long for me to reply. Been traveling. I removed the flairs and cleaned the back side and the side of the fender, so it would have a clean surface to adhere to. Then loosely reinstalled the flairs and wedged the straw into the back of the flair, between the fender and the flair and injected foam until I though there would be enough to fill the area between the back of the flair and the fender. The foam will expand out of the area, and after it cures, use a sharp knife to trim the foam so it does not show. Good luck.
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