You’ve definitely seen the bottle with the orange cap. It’s sitting on a shelf in your garage right now, or maybe it’s buried in a junk drawer under some old batteries. Gorilla Glue is basically the "Band-Aid" of the adhesive world—a brand so dominant that the name itself has become a verb for fixing stuff that won't stay put. But if you look up mark singer gorilla glue net worth, you'll find a lot of conflicting numbers and some pretty wild stories.
Most people assume the guy who started a company that sells millions of bottles a year must be a billionaire.
He isn't. Not even close.
Mark Singer is a woodworker. He's an artist. He’s the kind of guy who gets excited about the grain of a teak board or the curve of a chair leg. He isn't some corporate shark who sat in a boardroom plotting global dominance. In fact, he actually sold the company decades ago, long before it became the massive household name it is in 2026.
The Indonesian Connection
Back in the early 1990s, Mark was in Indonesia. He wasn't there to start a chemical empire. He was there for furniture. Specifically, he was checking on the manufacturing of his high-end outdoor teak furniture line, Giati Designs.
While watching the local craftsmen, he noticed they were using a specific type of glue he’d never seen back home. It was a polyurethane adhesive. Unlike the standard yellow wood glue most Americans were used to, this stuff was waterproof, incredibly strong, and it expanded as it cured.
Mark realized this wasn't just for teak. It worked on metal, stone, and ceramics too. He was basically staring at a gold mine in a plastic bottle.
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He tracked down the original Danish manufacturer, secured the North American rights, and launched the brand in 1994. He called it Gorilla Glue. Simple. Tough. Memorable. For the first few years, it was a tiny operation. We're talking two people working out of a small space, mostly selling to professional woodworkers through mail-order catalogs and specialty shops.
The Sale That Changed Everything
Here is where the mark singer gorilla glue net worth conversation gets tricky. In 1999, just five years after starting the business, Mark sold it.
He sold it to the Ragland family, who owned the Lutz Tool Company in Cincinnati. At the time, Gorilla Glue was successful, but it was still a niche product. The Raglands were the ones who took it to the "big box" stores like Home Depot and Lowe's. They were the ones who expanded the line into tapes, epoxies, and super glues.
Mark walked away with a significant payout, but he missed out on the exponential growth that happened in the 2010s and 2020s.
"My most valuable commodity isn't my money, it's my time," Mark said years later. "You can always make more money, but you can't make more time."
That’s a heavy sentiment. It explains why his net worth isn't in the billions. He chose a life of design over a life of managing supply chains.
How Much is Mark Singer Worth in 2026?
Estimating a private individual's wealth is always a bit of a guessing game unless they're on the Forbes 400. However, looking at his business history gives us a pretty clear picture.
- Gorilla Glue Sale: The 1999 sale likely netted him several million dollars—a huge sum then, though modest compared to what the brand is worth today.
- Giati Designs: He founded and eventually sold this high-end furniture company as well.
- EyeWris: This is his latest venture with his son, Kenzo Singer. They actually appeared on Shark Tank (Season 14) to pitch their foldable wrist-worn reading glasses.
While some speculative "wealth tracker" sites throw around numbers like $250 million or $500 million, those figures are almost certainly inflated by confusing Mark with the current owners (the Raglands). Realistically, based on his career as a successful serial entrepreneur and master craftsman, Mark Singer’s net worth likely sits in the **$15 million to $35 million** range.
That’s "never have to work again" money, but it’s not "buy a professional sports team" money.
The Shark Tank Comeback
If you want to see the real Mark Singer, go watch his Shark Tank episode. It was honestly one of the most emotional moments in the show's history.
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He and Kenzo were asking for just $25,000 for 5% of their company, EyeWris. The Sharks were baffled. Why would the guy who started Gorilla Glue need twenty-five grand?
Mark’s answer was heartbreakingly honest. He alluded to health struggles and told the Sharks he didn't have the energy to build another company from the ground up. He wasn't there for the cash; he was there to find a mentor for his son. He wanted to make sure Kenzo was "in good hands" before he could no longer help him.
Lori Greiner was literally in tears. All five Sharks eventually teamed up to offer them a deal, which is something that almost never happens.
Business Lessons from the Gorilla Glue Story
So, what can we actually learn from Mark Singer? His story isn't the typical "hustle until you die" narrative. It’s actually kind of the opposite.
1. Know your limits.
Mark realized he was a creator, not a corporate manager. He sold Gorilla Glue when it became too big for two people to handle. He prioritized his craft over his bank account balance.
2. Innovation is about observation.
He didn't invent polyurethane glue; he just saw a better way to market it. He took an industrial product and made it a consumer staple by giving it a name that sounded "tough."
3. Legacy isn't just a balance sheet.
Mark’s appearance on Shark Tank showed that he cares more about his son’s future and the quality of his designs than he does about hitting a certain net worth milestone.
4. Timing is everything.
Selling in 1999 meant he missed the "Gorilla Tape" explosion, but it also gave him 25 years of freedom. Was it worth it? To him, clearly, yes.
Moving Forward With Your Own Ventures
If you’re looking at Mark Singer’s story as inspiration for your own business, don't focus on the final number. Focus on the transition from "idea" to "asset."
Start by looking for products used in one industry that could solve a problem in another. That's exactly what Mark did in Indonesia. Once you have a product, don't be afraid to partner with people who have the infrastructure to scale it—even if it means giving up a piece of the pie (or the whole thing).
Determine what your "enough" number is. Mark found his, and it allowed him to spend the rest of his life doing exactly what he loved: working with his hands and building things that last.
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Check out the current state of EyeWris if you want to see what he's up to now. It’s a masterclass in functional design.