Yeah, epoxy can definitely be a temporary fix if the underlying issue isn't sorted out. Had something similar happen at my uncle's place—he kept patching up his porcelain sink, thinking it was just bad luck or cheap materials. Turned out the cabinet underneath had warped slightly from moisture, causing uneven support and constant stress on the sink. Once we shimmed it properly and got everything level again, the crack repairs actually held up pretty well.
Might be worth double-checking your setup underneath before you go all-in on another epoxy job. If it's flexing even a tiny bit, you'll probably keep chasing cracks no matter how careful you are with the repair kit. Good luck with it though... these things can be frustrating, but you're definitely not alone in dealing with this kind of headache.
Had a similar issue when I first moved into my place. Thought I was being clever with the epoxy kit, but after the third crack showed up, I started feeling like I was playing whack-a-mole with my sink. Turns out the previous owner had DIY'd the plumbing underneath and left things slightly off-level. Once I got that sorted (with some help—I'm no plumber), the epoxy actually held up fine. Might wanna peek under there just to be sure you're not dealing with something similar...
"Turns out the previous owner had DIY'd the plumbing underneath and left things slightly off-level."
That's a good catch, but I'd argue that epoxy kits are usually just temporary fixes anyway. Even with perfectly level plumbing, sinks endure constant temperature shifts and impacts from daily use, which epoxy isn't always designed to handle long-term. When I faced a similar issue, I eventually opted for a professional replacement—costlier upfront, sure, but it saved me from repeated headaches down the line. Just something else to consider before committing to another DIY round...
"Even with perfectly level plumbing, sinks endure constant temperature shifts and impacts from daily use, which epoxy isn't always designed to handle long-term."
Yeah, epoxy kits can be hit or miss for sure. Reminds me of when I moved into my first apartment and found out the sink had been patched up with some DIY epoxy job by the previous tenant. It looked alright at first glance, but after a few months of regular use—hot water, cold water, dishes banging around—the epoxy started cracking again. Ended up dealing with leaks and water damage underneath, which was a total headache.
In the end, I bit the bullet and got someone in to replace the whole thing properly. Wasn't thrilled about the cost at the time, but honestly, it felt like money well spent once I wasn't constantly worrying about another leak popping up. DIY solutions can work temporarily, but sinks take a beating day-to-day...so sometimes it's worth it to just get it done right the first time.
Yeah, epoxy can definitely be a gamble for sinks. I've seen plenty of cases where it holds up fine for a quick fix, but the real problem is when people skip proper prep steps. If you don't sand the surface properly, clean it thoroughly, and let it cure fully before using the sink again, you're just asking for trouble. Curious—did you follow all those prep steps closely, or just slap it on and hope for the best?
