ZoopSeal.
I have used ZoopSeal on several different types of aluminum. I used it to seal a turbo charger compressor housing which when it dried it came out with pin point size bubbles on it.
I contacted ZoopSeal and they advised to rub the sealer in, which is contrary to their instructions. I then re-polished the housing and re-applied the sealer, it came out real nice.
I have tried it on other different aluminum pieces with mixed results. I put one piece in the sun to dry and it came out lousy. The others I left inside and they were fine.
In my opinion the humidity has a lot to do with the way this sealer cures, just my observations.
If you use it follow the instructions to the letter. Mix the sealer three-to-one. The instructions give examples of mixing different quantities, the instruction I got were incorrect! Go to their web site and get the instructions there.
John
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