Vent issues
#21
We use open cell foam to seal our doors. Most factory open cell foam is a polyester based foam that is biodegradable, which is why it comes apart and blows out of the vents. Our foam is a synthetic polyether based foam that is not biodegradable and therefore will not deteriorate like the original foam. We have never had a failure with any of our kits ever.
These trucks are getting to the age that some will get restored. Mine probably won't as I bought it to work, but some people just like the looks of their equipment and try to make it new.