I've patched up a few composite sinks myself, and honestly, the DIY kits are pretty hit-or-miss. If you're determined to try it yourself, here's what I'd do: clean the crack thoroughly (no shortcuts here), sand lightly around the area for better adhesion, and apply epoxy carefully in thin layers—don't rush it. But realistically, if the crack's more than superficial, you're probably just delaying the inevitable. A pro fix might sting your wallet now, but it'll save you from redoing the job later...
I've seen a few DIY epoxy fixes hold up surprisingly well, actually. My uncle patched his composite sink about two years ago, and it's still going strong—though he's pretty meticulous with these things. I think the key is patience and prep work, like you mentioned. But honestly, sometimes even the pros don't guarantee it'll last forever... I've seen professional repairs fail too, especially if the sink gets heavy daily use or if the crack's in an awkward spot.
If you're handy and don't mind spending a Saturday afternoon on it, I'd say give the DIY route a shot first. Worst-case scenario, you're out a few bucks and some time, but at least you'll know you tried before shelling out for a pro replacement. Just my two cents though—every situation's different.
I've seen DIY epoxy fixes go both ways, honestly. A lot depends on the preparation, as you've pointed out, and also the sink's daily workload. If it's a heavily used kitchen sink, even a careful DIY job can struggle over time. But your uncle's experience is encouraging and proves it can be viable with patience and thoroughness. I'd say your advice is pretty spot-on—worth a try before investing in a pro fix, just keep expectations realistic. Good luck with it!
"A lot depends on the preparation, as you've pointed out, and also the sink's daily workload."
Definitely agree with this. I tried DIY epoxy on my bathroom sink a few months back—followed instructions to a T—but it's already showing tiny cracks again. Still, worth the learning experience before calling in a pro, I guess...
I've had a similar experience with DIY epoxy kits, and yeah, prep is huge. I remember spending hours sanding and cleaning my old kitchen sink before applying the epoxy. Looked great at first, but within six months or so, little hairline cracks started popping up again—probably from all the pots and pans banging around. Ended up biting the bullet and getting a pro reglaze job later on...no regrets so far.
