Yeah, I've noticed articsteve being quite pro-Krown as well. I've had the 'worthless dripless gunk' applied to my car when I bought it and I'm quite happy with it so far. I'll be glad to post anything that happens to the car rust-wise in the future to prove/disprove this.
Articsteve's right when he says that the dripless stuff can and will trap moisture in. This is why my Subaru dealership insisted it be done before I took the car on the road to minimize/eliminate this problem. Once again, I'll be glad to post anything should something occur.
I took the dripless option over Krown for the following reasons:
- cheaper in the long run
- no dripping anywhere
- no smell
- no making appointments every year
If you have a used car, Krown's your only option as the dripless stuff will indeed trap moisture. If you have a new car that you haven't taken delivery of yet, then the one-shot dripless stuff does become a viable option.
Since an educate consumer is worth his/her weight in gold, check out both sites and compare the pros/cons:
http://www.krown.com/
http://www.permaplate.com/
Both companies seem, IMO, good and they've both been in business for decades.
I've had the 'worthless dripless gunk' applied to my car when I bought it and I'm quite happy with it so far.You need to be because of your up front costs.

It takes 8 to 12 years for rust to pop thru if it is exposed to salt. At which point the car is a goner.
Articsteve's right when he says that the dripless stuff can and will trap moisture in.If the guckie stuff formed a permanent moisture barrier somebody would be using it on foundations.
The guckie stuff does not atomize, hence it can't enter interior panels and spread. If you ever have the opportunity to peel open an interior body panel you will see what a farce your stuff is. Go to wrecking yards and examine cars that have been torn apart in accidents and invariably you will find one that has been the recipient of the guckie stuff and what you see inside a panel is a line of the stuff and then lines of drips were gravity took the stuff and then it dried on the way down and stopped.

Here is what Krown will do for cars as well as save the body panels. If you worked on 10 year old cars it would mean something to you. This take from the site ex-Junkie posted above.
Seams, welds, folds, and crevices
Riveted pieces, chains
Door & lock mechanisms
Gas tanks & straps
Brake cables
Wheel hub nuts
Oil pan, transmission nuts & bolts
Mirror mounts
Seized parts, nuts, and bolts
Rollers, castors, hinges, brackets, release cables
Window door/lock mechanisms
Coil & leaf springs, U bolts
Electrical wiring, lights, electrical connectors, battery post & cables
Any area where dissimilar metals are fastened (aluminum & steel)
Radiator brackets, shrouds & casings
Headlight Adjusters