In that case, if you don't want to spend 100 bucks you may have to source some rubber that you can make the ring/seal from, often enough, going for the option that seems to be the cheapest endup being a big mistake so, consider your options.Thanks. I have a real old devilbiss 9.8 gallon tank that my grandfather used to spray paint with when he was alive. He used paint thinner in his paint and the pots have been sitting unused for about 5 years. The rubber seal has become brittle and broken.
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I did the Harbor Freight paint pot mod too. Had a terrible time getting it to hold a seal. Realized after several tries and hacks that the assembly team had put the O-ring upside down with the bevel side of the seal down! After flipping it over I had no problem holding pressure. I guess my walkaway from this is that every little detail needs to be checked no matter what "reputable" product you are dealing with.I have a Harbor Freight paint pot and the gasket was problematic the day I bought it. I recall (it's been a couple of years.) that I pulled the old gasket out of the lid, set it some place level, then filled the gasket ridge with Mold Max 30 ( https://www.amazon.com/gp/product/B004BNF3TK ). Worked like a charm. I had some of that silicone on hand, so it may have been overkill. Something cheaper like Permatex Gasket Maker might work as well ( https://www.amazon.com/gp/product/B0002UEOKK ).. I've got some of that on order to redo the seals on my vacuum chamber forms.