I had a swamp cooler air conditioning unit that the pan was rusted out of, when it went o go purchase a new one they were $640 amd out of stock, then I came to the conclusion, why not try sealing with all of the extra automotive supplies i have on my shelf, so i ended up using por15 for rust treatment and raptor liner spray in bed liner to seal and coat everything, alittle right stuff silicone and another layer of raptor liner painted on this time and it seemed to do the trick. hope thos helps somebody, see ya next time

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