Stuff like this makes me feel less alone in figuring out quick fixes... roofs always seem to spring leaks at the worst times.
You’re definitely not alone—my roof’s pulled the same stunt on me more than once. I’ve tried the spray sealant and, honestly, it held up through a couple months of rain before I could get a real repair. Not perfect, but way less embarrassing than the “blue sail” look. Sometimes you just need something that’ll buy you time and sanity.
Not perfect, but way less embarrassing than the “blue sail” look.
I’ll admit, I’ve done the tarp thing more times than I care to remember. Spray sealant’s decent for a pinch, but if you’re dealing with anything bigger than a nail hole, it’s just a band-aid. Ever tried patching with EPDM rubber? It’s not pretty, but it’ll hold up better than most quick fixes—especially if you’re waiting out a wet season.
EPDM patches definitely beat tarps if you’re stuck waiting out a season, especially with flat roofs or low slopes. I’ve slapped those on in the middle of a thunderstorm—ugly, but they’ll keep the inside dry. That said, if you’ve got shingles curling up or missing, it’s just triage. Nothing really replaces pulling the bad section and doing a proper repair when you get a dry spell. Seen folks try Flex Seal too... wouldn’t trust it for more than a week or two, honestly.
“Seen folks try Flex Seal too... wouldn’t trust it for more than a week or two, honestly.”
That’s been my experience as well. Flex Seal and similar products are really just a stopgap—maybe buys you a few days if you’re in a pinch, but I wouldn’t count on them holding up through any real weather. I tried it once on a small split in an old asphalt shingle, and after the next rain, water was still finding its way in around the edges. It’s better than nothing if you’re desperate, but not by much.
EPDM patches are definitely a step up, especially for flat or low-slope roofs where tarps just pool water and make things worse. I’ve used those peel-and-stick EPDM patches on my garage roof (low pitch, old rolled roofing) during a surprise spring storm. Not pretty, but it kept the tools dry until I could do a full tear-off later that month. The key is making sure the surface is as clean and dry as possible before sticking anything down—sometimes easier said than done when it’s pouring outside.
I agree with your point about shingles curling or missing being just triage. Once they start to go, patching is only going to buy you time. I had a section over my porch where the wind ripped off three shingles last winter. Tried nailing down some replacements in between storms, but the underlayment was already shot. Ended up pulling the whole section once things dried out and replacing the felt and shingles properly.
One thing I’d add: if you’re dealing with repeated leaks in one spot, check your flashing too. Sometimes what looks like a shingle problem is actually failed flashing around vents or chimneys—especially if you see water stains running down interior walls near those areas.
Quick fixes have their place, but nothing beats getting up there when it’s dry and doing it right. Until then, anything that keeps water out—even if it looks rough—is worth trying. Just don’t expect miracles from spray-on stuff or tarps for more than a couple weeks at best.
Flex Seal is basically the duct tape of the roof world—good for a laugh and maybe a day or two of peace of mind, but I wouldn’t bet my basement on it. Last summer, I noticed a drip right over my laundry area during a thunderstorm. Naturally, I panicked and grabbed the first thing I saw at Home Depot, which happened to be a can of Flex Seal. Sprayed it on like I was frosting a cake, but by the next rain, it was back to drip city. My wife still teases me about my “miracle fix” whenever she hears the weather report.
I’ve had better luck with those peel-and-stick patches too, especially on my old shed roof. It’s not pretty—looks like I patched it with giant black stickers—but it actually held up through a couple months of rain and snow. The trick really is getting the surface dry, which is borderline impossible in the middle of a storm, but hey, you do what you can.
One thing I learned the hard way: tarps are only as good as your tie-downs. Tried to save a few bucks by using bungee cords instead of proper straps, and the whole thing turned into a sail. Woke up to find the tarp halfway across the neighbor’s yard and my attic insulation soaked. Lesson learned—sometimes cheaping out just means more work later.
I’d second the advice about checking flashing. I spent weeks chasing what I thought was a shingle leak, only to find out the real culprit was a tiny gap in the chimney flashing. Five bucks’ worth of caulk fixed what three tubes of Flex Seal couldn’t.
If you’re on a budget like me, sometimes you just have to patch things up and cross your fingers until you can afford a real repair. Just don’t expect any of these quick fixes to last forever... unless you like living dangerously (or enjoy buckets in your living room).