- I hear you on the critters—had a squirrel chew through foam once, so now I’m a bit paranoid.
- For me, it’s usually silicone in high-moisture spots (like around tubs or exterior walls), but expanding foam for bigger gaps where movement isn’t an issue.
- Sometimes I’ll double up: foam for the bulk, then a silicone bead over top for weatherproofing. Not sure if that’s overkill, but it’s worked so far.
- Ever tried those hybrid sealants? I’ve seen them at the hardware store but haven’t tested them yet... curious if they’re worth the hype.
Sometimes I’ll double up: foam for the bulk, then a silicone bead over top for weatherproofing. Not sure if that’s overkill, but it’s worked so far.
I’m all about “overkill” if it means not having to pay for a plumber or pest guy later. Tried those hybrid sealants once—honestly, they’re pricier and didn’t seem any tougher than the classic foam + silicone combo. My wallet noticed, but my pipes didn’t.
I’ve done the foam + silicone thing for years—never had a leak or critter sneak in. Tried those “all-in-one” sealants too, but honestly, they just felt like marketing hype. If it ain’t broke, don’t fix it, right? My only tip: check back after a season or two. Sometimes that foam shrinks more than you’d think...
If it ain’t broke, don’t fix it, right? My only tip: check back after a season or two. Sometimes that foam shrinks more than you’d think...
That’s actually my biggest gripe with foam—folks trust it a bit too much. It’ll look solid for a year, maybe two, but then you get those weird drafts or a mouse finds its way in and suddenly everyone’s scratching their heads. Ever try pulling old foam out? It’s a mess.
I’m curious, though: when you’re checking back after a season or two, are you just looking for gaps, or do you actually poke around? I’ve seen jobs where the outer silicone bead looked fine, but underneath, the foam had shrunk away from the pipe. That’s usually where trouble starts.
The “all-in-one” stuff… yeah, I’ve tried it too. Some of it cures too rigid, which can actually crack if your pipes shift at all. Not saying the old-school way is perfect, but at least you know what you’re working with.
Ever run into issues with code inspectors nitpicking your sealant choices? Some of them get real picky about fire-rated foam vs. regular stuff, especially around gas lines.
I get what you’re saying about foam, but I think it’s still better than just stuffing in fiberglass or leaving gaps. I’ve seen mice chew through almost anything, not just foam. If you’re really worried about it shrinking, I’d go with backer rod and a good quality caulk over the top—less mess if you have to redo it later, and easier to spot problems. Inspectors around here are definitely strict about fire-rated stuff, especially anywhere near utilities. I’ve had to redo a couple spots just because I grabbed the wrong can... learned my lesson quick.