This $7 Epoxy Putty Saved My Home From Thousands in Water Damage

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Credit: Jeff Somers

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Ever since our house flooded in the middle of the night (though thankfully before we fell asleep), my wife and I have been diligent about setting up water alarms all over the house, so we'll receive crucial warning the moment something leaks or backs up.

Well, the other night, the alarm under the kitchen sink went off while the dishwasher was running—and, sure enough, there was water gushing out of the sink drain. Luckily, I was able to turn off the water and clean everything up before it totally ruined my cabinets and floors. I started my investigation into the problem, and about three seconds later, it was obvious: My sink drain had a huge gap in it:

It was actually kind of amazing—a chunk of pipe was just gone, and what was left was as fragile as tissue paper. I called a few plumbers, but no one could get to me for a few days (plumbers have a very narrow definition of the word “emergency”). I was faced with the prospect of not being able to use my kitchen sink or dishwasher for a while, or risk further damage to my house. But I had another option: A quick fix with an epoxy putty.

Epoxy putty is an easy, water-resistant solution to leaks

Epoxy putties all work generally the same: They contain a resin and a hardening agent, and when these clay-like materials are combined, a chemical reaction quickly hardens them into whatever shape you work them into. There are a few major brands to choose from, including J-B WaterWeld, PC-Plumbing Epoxy Putty, Oatey Stick Fix-It, and Loctite Epoxy Putty. I happened to have some WaterWeld on hand, so that’s what I used to save my kitchen, but any of these products will probably work as well.

How to quickly patch a leak with epoxy putty

The process is pretty straightforward: First, you pinch off as much putty as you think you’ll need (wear gloves—this stuff can irritate your skin). Knead the material together, mixing the resin and the hardener until it’s all one color:

Now apply the putty to your leak. In my case, I used pretty much the whole package to encapsulate the massive hole in my kitchen drain, as you can see in the photo at the top of this article.

Different products will have different working times and hardening times. WaterWeld takes about 25 minutes to set, so you need to work relatively quickly. Luckily, temporary plumbing repairs don’t need to be pretty. I just rolled it onto the drain, pressed it into place, and worked the edges to create a seal. It's important to note that epoxy putty products like this are intended for low-pressure repairs; while they can probably plug pinhole leaks in high-pressure pipes, a repair of this size wouldn't have worked if under any sort of intense water pressure.

WaterWeld cures in about an hour, so after waiting it out, I went ran the water in the sink for a while to test it—and not a drop came out. Then I ran the dishwasher with my water alarm in place, and experienced zero problems. The putty repair held for the three days it took a plumber to show up (to add insult to injury, he wasn’t even impressed with my brilliant temporary fix). In the meantime, we were able to use the kitchen normally without risking further water damage. For a product that costs about $7, that’s not bad.