Made in America
Support American manufacturers + independent hardware retailers in one purchase.
Why this matters
When you buy American-made, an estimated 90 cents of every dollar stays in the U.S. economy versus far less for imported goods.
We can’t ship this item to . Orders to a restricted state are canceled and refunded — pick it up at your local store instead.
Trusted Brands Only
Authentic products from the manufacturers you know. No knockoffs, no marketplace risk.
Ships Nationwide
Shipped nationwide from our own facilities, direct from authorized manufacturer channels.
Real Hardware Experts
Questions? Reach real people, not a chatbot. Call (866) 469-8556.
Pro Accounts Available
Net 30, bulk pricing, gov compliance. Apply →
Flex Seal Epoxy is a non-sag black paste built for repairs that need to hold fast and stay put, even on vertical surfaces. It bonds to metal, wood, PVC, tile, plastic, glass, ceramic, concrete, brick, and stone, so it works for patching, filling, and rebuilding on almost anything around the house or shop.
You get about 45 minutes of working time to position and shape the repair before it sets, with a full cure in 24 hours. It's solvent resistant and rated for both indoor and outdoor use, making it a solid pick for jobs that face weather or chemical exposure.
| Brand | Flex Seal Family Of Products |
|---|---|
| Model / MPN | EFSBLKR2X15 |
| UPC | 810129871876 |
| Weight | Under 1 lb |
| Country of Origin | USA |
You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.
On Amazon, start with these four questions before you click buy.
The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.
Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Flex Seal Family Of Products. A third-party marketplace seller usually isn't.
Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.
Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556
Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.
Why we tell you to shop localOr skip the tabs entirely and buy it down the street. Find a store near you →
Whether you're a contractor, property manager, facility team, or government buyer — one application unlocks pricing, terms, and service built for the way you actually buy.
Apply for a Pro Account Or call (866) 469-8556Every product comes directly from the trusted manufacturers you know — sourced directly through authorized manufacturer channels — the trusted brands your neighborhood hardware store carries.
When something's better bought down the street, we'll tell you — and point you to a local store that stocks it. We list independent retailers at no cost to most of them. We're not a marketplace, not a chain, not a faceless warehouse.
We come from the hardware world — the people answering your questions know the products, not just a script. Questions about fit, compatibility, or what a job actually calls for? You'll reach a real person, not a chatbot or a contracted call center.
The world's fast and convenient now, and it's only getting faster — same-day, next-hour, a screen where a face used to be. That's not going away, and we're not pretending it should. We live here too. We can move when you need us — most orders land in under two business days.
But the store on the corner probably has it on the shelf right now. And it was never only about speed. It's the person who knows the product and knows your name. It's what that store puts back into the town — the people it hires, the team it sponsors, the neighbor it shows up for. That's the part a warehouse can't ship.
These places have anchored their communities for generations. Keeping them around for the next two hundred and fifty years matters more than any single sale — ours included. So we'll be the convenient option when you need one, and we'll point you local whenever it makes sense. If it's better bought down the street, we'll say so.
If you're rooting for a handful of giant corporations to swallow every small store on Main Street — we'll be straight with you: we're not your shop. And that's alright. We were never trying to be everyone's.
We support local hardware stores.
We don't replace them.
National Hardware Group is an authorized seller of Flex Seal Family Of Products products, sourced directly through authorized manufacturer channels. Every Flex Seal Family Of Products item ships with full manufacturer warranty support, authentic packaging, and the quality assurance that comes with buying from a trusted channel.
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