I hear you on the steel wool—I've seen it turn into a rusty mess under a leaky sink. If you want a step-by-step that’s worked for me: first, poke around with a flashlight and mark every gap, even the ones you think are too tiny. Next, I use stainless steel mesh (not the regular stuff) and pack it in tight. Then, I hit it with a layer of that pest-blocker foam—it's supposed to be chew-resistant, though I’m not convinced mice can’t just laugh at it and chew through anyway. Still, it’s held up better than just foam or just steel wool. Mice are like little plumbers themselves... always finding a way in.
That stainless mesh trick is underrated. I tried regular steel wool under my old kitchen sink and it was a rusty disaster in less than a month—plus, the mice still managed to wiggle through. Stainless holds up way better, especially if you get the finer stuff that’s tough to pack in. I’m with you on the foam... I’ve watched a mouse gnaw right through it like it was nothing, but the combo seems to slow them down at least. Mice really are relentless—almost admire their determination, if they weren’t wrecking my plumbing runs.
I hear you on the foam—mice treat that stuff like a snack bar. Stainless mesh is the only thing that’s held up for me, too, but I’ve had to double-layer it in some spots. Ever tried copper mesh? Some folks swear by it, but I’m not convinced it’s any better than stainless. Mice are basically tiny furry engineers... if only they’d use their powers for good instead of plumbing sabotage.
Mice are basically tiny furry engineers... if only they’d use their powers for good instead of plumbing sabotage.
- Had the same issue with foam—total waste of money for me, honestly.
- Tried copper mesh once since it was cheaper at the hardware store. Didn’t notice a difference, but maybe I didn’t pack it tight enough?
- Stainless mesh seems pricier up front, but I only had to redo those spots once.
- Mice chewed through everything else, even some caulk. It’s wild how determined they get.
- Still not sure copper’s worth it unless you find a deal... anyone actually seen it last longer?
Copper mesh was a bust for me, too. I get the appeal—cheaper, easy to stuff in gaps—but those little “furry engineers” just treat it like an obstacle course.
No kidding. I swear, if they ever unionize, we’re all doomed.“Mice chewed through everything else, even some caulk. It’s wild how determined they get.”
Here’s what finally worked for me (after way too many failed experiments and a few late-night hardware runs):
1. Stainless steel mesh—yeah, it’s pricier, but I only had to patch up once after a year. The trick is to really jam it in there, almost like you’re mad at the wall. If you leave any wiggle room, they’ll find it.
2. For smaller cracks, I used a combo of mesh and a layer of silicone caulk over the top. The caulk alone was pointless (they just chew right through), but as a “glue” for the mesh, it actually held up.
3. Skipped the foam after watching them tunnel through it like it was cotton candy. Total waste of cash.
4. Copper mesh—honestly, unless you double or triple it up, I wouldn’t bother. Even then, it seems like it oxidizes and gets brittle over time? Maybe that’s just my luck.
If you’re on a budget, sometimes you can find offcuts of stainless mesh at metal shops or even online marketplaces. Doesn’t have to be fancy—just dense enough they can’t bite through.
Mice are relentless, but with enough layers and a bit of stubbornness, you can out-engineer them... at least for a season or two.