Had a buddy that swore he sprayed this goop into the rocker panels of every car/truck he's ever owned. Claimed it stopped rust by forming a barrier and made the car more rigid. Never drove his car before/after for a rigity test but he did let me hoof the lower panel section of an 88 GMC cargo van with my steel toes. I couldnt walk for a day and the panel didnt even dent !!