my little can sits on a shelf in an airconditioned room, Ive opened it twice - and only used about a tablespoon of it.

I cleaned the lid perimeter and sealed the can with a hammer - it hasnt bulged yet. Is my POR-15 junk now?

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)