Rant: Why does every half-used tube of paint come with a dried out cap?

I was sorting through a box of old acrylics I got from a swap last week and noticed something weird. Every single tube that was half empty had a cap completely crusted over with dried paint, like someone just screwed it back on without cleaning the threads. I spent 20 minutes soaking them in warm water just to get a single drop out. Then I checked online and found out that leaving paint residue on the cap can actually ruin the tube's seal over time and let air in, making the rest go bad faster. Who knew such a tiny thing could waste half a tube of good paint? Has anyone else had this problem or found a trick to stop caps from getting gunked up?

2 comments

2 Comments

paulperry1mo ago

Agreed with @luna_green about the jeans trick, that's a solid hack for sure. But honestly I used to be the guy who just shrugged and figured dried caps were just the price you pay for cheap paint. It never really crossed my mind that it could actually mess up the paint inside. Seeing you lay out how the seal breaks down over time changed my mind completely. Now I make a point to wipe the rim and threads with a damp paper towel every time I recap a tube, and it's saved me a ton of grief. Takes ten seconds and beats tossing half a tube because I was too lazy to clean it.

luna_green1mo ago

honestly the universe just hates us specifically i swear. like the paint knows you're not going to use it all so it teams up with the cap to make your life harder. i've wasted so much time scraping dried paint off threads with a toothpick it's not even funny. my pro tip is just wipe the dang threads on your jeans before you screw it back on, it's not perfect but it beats soaking tubes for half an hour. or just accept that every half used tube is a gamble and buy new paint every time like a sucker lol.