That UV glue stuff is surprisingly tough, right? I tried it on a cracked storm window last fall—was skeptical at first, but it held through a pretty rough freeze-thaw cycle. For energy savings, I’ll sometimes slap on a layer of that shrink-wrap plastic too, even if the crinkle drives me nuts. Tape’s a last resort for me... once spent an hour scraping residue off old glass. If you’re worried about drafts, a bead of clear caulk along the crack (outside edge) can help too, though it’s more of a pain to remove later.
That UV glue is wild—I was weirdly impressed by how well it stuck when I tried it on a cracked basement window. I do wonder, though, if it holds up long-term or if I’ll find the crack spreading when temps swing again. The shrink-wrap plastic is a lifesaver for drafts, but yeah, the crinkling drives me up the wall too. I’ve heard some folks use double-sided tape for the plastic, but I’m paranoid about the residue. Has anyone tried using silicone instead of caulk for sealing cracks? I’m curious if it’s any easier to remove later.
I totally get the paranoia about double-sided tape. I tried it once on a kitchen window and ended up with sticky lines that took forever to scrub off. As for silicone, I patched a crack in our bathroom window last winter with clear silicone instead of caulk. It worked okay—definitely easier to peel off than caulk when I replaced the pane in spring, but it left a faint outline I couldn’t quite clean up. Still, it held through some wild temperature swings, so maybe worth a shot if you’re not looking for a perfect finish.
Sticky residue from tape is the worst—had the same issue trying to keep a pane together during a cold snap. I think the adhesive just doesn’t handle temperature swings, and you end up scrubbing forever. I’ve actually had better luck with painter’s tape if it’s just for a few days, but it’s not exactly strong.
The silicone trick is interesting. I’ve used clear silicone sealant on a cracked aquarium (not ideal, but it held for months), and it peeled off cleaner than I expected. The faint outline you mentioned seems pretty unavoidable though, especially if sunlight hits that spot—UV seems to bake it in over time.
One thing I’ve seen people try is using packing tape on both sides of the glass to “sandwich” the crack. Doesn’t look great, but if you’re just trying to prevent shards from falling out before a proper fix, it works in a pinch. Just be careful with condensation—moisture can get trapped and make things worse.
Honestly, nothing’s perfect unless you replace the glass, but for quick fixes, silicone or certain tapes seem like the least hassle, as long as you’re realistic about cleanup later.
The silicone trick is interesting.
Interesting point about the silicone. I’ve always wondered, does using silicone or tape as a temporary fix noticeably affect the window’s insulation value? I’d think drafts could still sneak in around the crack, especially if the seal isn’t perfect. Anyone ever tried a plastic window film over the whole pane for extra efficiency?
I’d think drafts could still sneak in around the crack, especially if the seal isn’t perfect.
- Totally agree, silicone’s only as good as your patience with the caulking gun. I’ve had to redo spots where I got lazy and, yep, cold air found its way in.
- Tape’s even sketchier. It peels, especially in winter.
- I’ve slapped that shrink-wrap plastic film over the whole window before. It actually helps more than you’d think, but you gotta get it tight or it looks like your window’s wearing a shower cap.
- None of these beat actually fixing the glass, but for a drafty old house like mine, sometimes you just gotta MacGyver it until spring...
Yeah, I’ve done the plastic film trick too—definitely better than nothing, but if you’ve got a big crack, you’ll still feel that chill sneaking in around the edges. Tape is basically wishful thinking unless you’re just desperate. Honestly, I’m always skeptical about quick fixes. If you’ve got the patience (and some gloves), a temporary plywood patch on the inside actually blocks drafts way better, even if it looks like you’re prepping for a hurricane. Not pretty, but it works till you can fix it right.
That’s a solid approach—plywood isn’t pretty, but it’s definitely effective for stopping drafts. I’ve tried the plastic film kits too, and while they’re decent for hairline cracks or just adding a bit of insulation, they don’t do much when the glass is actually compromised. The air just finds its way around, especially if the frame isn’t perfect or there’s movement from wind.
I’ll admit, I was skeptical about anything short of a full pane replacement after dealing with a cracked window in my old place. But necessity forced me to get creative last winter when I had a double-hung sash with a crack running almost the whole width. I ended up using a combination of rigid foam board cut to size and wedged into the frame, then taped around the edges with painter’s tape. Not exactly elegant, but it kept the worst of the cold out until I could get someone in for a proper repair.
I think your point about tape being “wishful thinking” is spot on—unless you’re just trying to keep broken shards from falling out, it doesn’t do much for insulation. But for those of us who have to wait weeks for a new window (or are just trying to avoid letting the heat bill skyrocket), these ugly fixes are sometimes all we’ve got.
One thing I’d add: if you’re using plywood or foam board inside, make sure you don’t block any essential ventilation or emergency exits. It sounds obvious, but in an old house like mine where some windows are painted shut, it’s easy to forget which ones are actually usable in an emergency.
Anyway, you’re definitely not alone in feeling skeptical about quick fixes. Sometimes ugly and functional wins out over pretty and ineffective... at least until spring rolls around.
I get the logic behind plywood and foam board, but honestly, I’ve had better luck with just using clear packing tape directly over the crack—at least for short-term fixes. It won’t do much for insulation, but it keeps the glass stable and doesn’t block light or emergency egress. Sure, it’s not a thermal barrier, but if you’re just trying to keep things intact until a real repair, sometimes simple is enough. Maybe not ideal in super cold climates, but in milder temps, it’s worked for me.
Packing tape over a crack definitely gets the job done if you’re just trying to hold things together for a bit—I’ve seen that trick used plenty of times, especially in rentals or when someone’s waiting on custom glass. It’s quick, cheap, and you don’t lose your view or make the room pitch dark. The main thing I’d ask is whether you’re dealing with single-pane or double-pane glass? On double-pane, sometimes a crack in just one layer can let moisture in, which’ll fog up the whole thing and make a mess of your insulation in the long run. Tape slows it down but doesn’t totally seal it.
One thing I’ve noticed is that if the crack runs all the way to the edge, tape doesn’t always keep it from spreading, especially if there’s temperature swings or if someone bumps the window. In those cases, I usually recommend running tape on both sides if you can reach them—it sandwiches the crack a bit better. Ever tried that? It’s not pretty but sometimes adds a little more stability.
I’ve also seen folks use clear contact paper or even that shrink-wrap winter insulation film as a temporary patch. Those can sometimes buy you more time and add a tiny bit of draft protection, though they’re not exactly bulletproof either. For what it’s worth, in colder climates (I’m up north), even a small draft can freeze pipes near a window if you’re unlucky, so I usually lean toward something with a bit more coverage if it’s going to be more than a week or two.
Curious—how big was the crack you taped? Hairline cracks seem to hold fine with tape, but anything wider than a couple millimeters always makes me nervous. Had one job where someone taped up a pretty big spiderweb crack and then their dog jumped against the window... wasn’t pretty.
Tape’s definitely better than nothing though, especially if you’re just trying to keep things safe until you can get proper glass in place.