We had froze door issues this past week... I try to keep those areas clean & dry . It was hard because down in the bottom of MI... it rained for 1-2 days prior the freeze... tried WD... works for a while. I use Beaver Slick teflon, company called Beaver Research out of KZoo .
I use this on the locks , hindges, seals, ect... ect... and always bring bolt choppers ... as an extra back up. This stuff is pretty universal , commercial food grade product ???? ( I believe ?? )
I don't know how to find the sales rep ... but a little WEB search should start to reveal some sources ...
I love this stuff.
mjk1