Quote:
Originally Posted by Sts70004
Kreem is good stuff but you hear a lot of Horror Stories regarding Kreem. From what I can tell it all boils down to three things:
1) Once the first step has been done, the tank dries out and "Flash Rusts"
2) Again, Once the second tank prep has been used the tank dries out and "Flash Rusts"
3) This is probably the most common: Don't allow enough time for curing. They recommend 24 hours, but every tank I've done I've let sit for about 3-5 days before filling it.
Before I used the stuff on my tank the first time, I did a few test on a piece of sheet metal, and you can't let the steel dry once you start, or a thin layer of rust will develop, and that will cause problems later on.
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If you look a few posts up you'll see the link I gave for 'advanced' step-by-step Kreem-ing. That writeup is pretty darn close to what the crusty old motorcycle mechanic I worked with used, and I've used it with some success (worked fine on 3 customer's tanks, but on mine? noooooo... but mine was a special case).
Yeah, I'd say the #1 and #2 problems people have with the Kreem is flash rust and not allowing enough time to cure. Both can result in the plastic "sack" that the Kreem becomes peeling away from the wall and / or clogging up the petcock.