Titebond vs. Gorilla Wood Glue — The Ultimate Wood Glue Test

People often ask which glue is better, Titebond or Gorilla Glue. At first, that sounds like a simple comparison, but it really is not.

Titebond is widely used in woodworking, while Gorilla Glue shows up in all kinds of applications. But once I started looking into it, I realized these products are not direct equals. Gorilla, like Titebond, is a brand name, not just one glue. Gorilla makes several types of glue, including a wood glue.

The original Gorilla Glue most people think of is a polyurethane glue, while Titebond II and Gorilla Wood Glue are both PVA glues. PVA stands for polyvinyl acetate.

For this test, I chose Titebond II because it is the closest match to Gorilla Wood Glue. Both are somewhat water-resistant, so that makes the comparison more reasonable.

What I wanted to find out was not just which glue holds better, but how each one behaves in ways that actually matter in the shop.

Workability Test

One of my main concerns with any glue is what I call workability. That simply means how easy it is to use.

I have had a lot of bad experiences with Gorilla Glue, but usually not when I was the one using it. The problem came later, when I had to clean up projects where the foamed squeeze-out had never been removed. Once that stuff hardens, it is very difficult to deal with.

So for this test, I glued up three sets of sample blocks using the three different glues. I wanted to see not only how well they bonded, but also how they handled during glue-up and cleanup.

One thing stood out right away. Of the three glues, Titebond II was the hardest to keep in alignment during clamping.

Normally, when I edge-glue boards, I use cauls to help keep everything flush. For this test, I did not use them. I used only a single trigger-action clamp on the ends so I could see how the glue itself affected the joint.

On the Titebond II sample, the pieces ended up out of alignment by more than 1/16 inch on one side. The Gorilla Wood Glue sample also shifted, but only about half as much. The polyurethane Gorilla Glue stayed the closest to alignment.

That tells me the polyurethane glue was the least slippery of the three. It gave the joint less lubrication, which helped keep the pieces from sliding around under clamp pressure.

That may or may not matter to you, but for me, it is part of what makes a glue easier to work with in real woodworking.

Cleanup Test

The next question was cleanup.

I let all three samples sit for about 24 hours, then came back to see how easily the dried glue could be removed. The usual approach is to clean it up with a chisel, so that is what I used on all three.

With Titebond II, cleanup went reasonably well, although the poor alignment made it harder to judge fairly. The glue still felt a little rubbery after a day. I could remove it, but it seemed like it would have cleaned up even better if it had dried a little harder and more brittle. Either way, after chiseling, I would still need to sand or plane the surface flush.

The Gorilla Wood Glue behaved a little differently. I noticed during glue-up that it had a lower viscosity, meaning it was runnier than the Titebond. That has pros and cons. It flowed more easily and formed more drips because the sample pieces were not sitting level.

Once dry, though, it actually cleaned up a little easier than the Titebond. It felt a bit harder and more brittle, which helped. It also dried much clearer. The Titebond left more of a yellow glue line, while the Gorilla PVA was much less noticeable.

The polyurethane Gorilla Glue had the most obvious squeeze-out, which was expected because it expands as it cures. But surprisingly, on a fresh glue-up, it cleaned up very easily.

That was interesting to me, because most of my past frustration with Gorilla Glue came from older repairs where the foamed squeeze-out had been left in place for a long time. Fresh, it was actually the easiest of the three to work with, even with all that expansion.

To show the difference, I pulled out an antique chair my wife recently bought. It had clearly been repaired with Gorilla Glue, and there was a lot of old, dark brown squeeze-out left behind.

Cleaning that up was a very different story.

Because the surface was curved, the job was harder to begin with, but the bigger issue was the glue itself. The old polyurethane glue was much more rubbery and did not cut cleanly at all. I was using the same chisel only minutes later, so the problem was not the tool. The problem was the age and condition of the glue.

That has really been my issue with Gorilla Glue over the years. It is not always the glue itself. More often, it is what happens when someone uses it and leaves the squeeze-out behind. Fresh is one thing. Old, neglected polyurethane glue is another.

From a workability standpoint, I would say the polyurethane Gorilla Glue was actually the easiest of the three to clean up when fresh.

Stain Test

All three glues claim they will keep their own color and not accept stain, so I wanted to check that for myself.

To test it, I drilled a shallow hole in a piece of wood, only about 1/16 inch deep, filled each one with glue, and then applied stain over the surface.

The Titebond II dried with a yellow cast. The Gorilla Wood Glue looked more white, and the polyurethane Gorilla Glue was whiter still.

But in the end, the important result was the same for all three. None of them accepted the stain.

In a way, it might be nice if glue did take stain, because it would blend in better with the wood. But that is not what these products are designed to do. In this case, all three performed as advertised.

Strength Test

At the end of the day, all of these glues have one job: hold wood together.

That is what really matters, so I wanted to test that directly.

Earlier, I mentioned the difference between tensile strength and shear strength. Tensile strength is the force required to pull something apart. Shear strength is the force trying to break the joint across the glue line. Most of the numbers you see on glue labels and spec sheets refer to tensile strength, but in woodworking, that is usually not how glued joints fail. What I see far more often is failure in shear.

So that is what I tested.

I glued up sample blocks and struck them until they failed, then looked closely to see what actually gave way. In theory, the wood should fail before the glue joint does. Since these samples were made from pine, which is relatively soft, that is exactly what I hoped to see.

To do the test, I worked my way up through a series of hammers, starting small and gradually increasing the force.

I started with a very light jeweler’s hammer. That did almost nothing. Then I tried a tack hammer, which also had very little effect. After that, I moved to a heavier ball-peen hammer, then a 16-ounce ball-peen, striking from about a foot above the sample. Finally, I stepped up to a three-pound sledge.

That is where things started to give.

The polyurethane Gorilla Glue failed first. The Titebond II and Gorilla Wood Glue both held longer, but after increasing the force, those samples failed too.

The important part came after the break.

When I looked at the failed samples, all three showed that the wood had broken rather than the glue line, at least in this round of testing. On the Gorilla Glue sample, the break was clearly in the wood. On the Titebond sample, the glue line was still visible, and the actual break was offset from it. The Gorilla Wood Glue sample showed the same thing.

That tells me the same basic story in all three cases: the glue joint was stronger than the wood itself.

There was one wrinkle, though. This was actually the second time I ran the test. The first time, which I did off camera on the other side of the same blocks, the polyurethane Gorilla Glue failed mostly at the glue line, with only part of the wood breaking. By contrast, both of the PVA glues failed in the wood much more clearly.

So if I were splitting hairs, I would say the two PVA glues gave me more consistent results in this test. But the bigger takeaway is that all three glues were strong enough to do the job when used properly.

And that last part matters.

These are not gap-filling glues. The larger the gap between the boards, the more likely the glue joint is to fail. That includes gaps caused by warped stock, rough saw marks, or edges that were never properly jointed.

That is why wood should be jointed before edge gluing. If your table saw and fence are accurate enough, you can sometimes get an edge clean enough to glue straight from the saw. I have done that many times. If not, then you need to joint it, either with a jointer or by hand with a plane, ideally a long jointer plane.

The goal is a minimal gap, something around six-thousandths of an inch or less, which is smaller than the thickness of a human hair. When the joint is that tight, these glues can do what they are supposed to do.

And in this test, all three of them did.

Curing Test

One of the claims Gorilla Glue makes is that it only needs 30 minutes of clamp time. As someone who has mostly used PVA glue, I was skeptical enough to want to test that for myself.

To make it a fair comparison, I glued up two sets of blocks: one with Titebond II and one with the polyurethane Gorilla Glue. For the PVA, I applied glue to one surface only, which is how I normally work unless I am gluing end grain. For the polyurethane glue, I followed the manufacturer’s directions by dampening one surface and applying the glue to the other.

Then I clamped both samples and gave them exactly 30 minutes.

At the 30-minute mark, I broke both samples apart. I was not trying to do a full strength test here. I just wanted to see whether the glue had actually cured.

The result was pretty clear.

The polyurethane Gorilla Glue looked fully cured. When I broke the joint, the glue appeared dry, and I could see glue on both mating surfaces in the same areas. That suggested the bond had set, even if I was not testing its full long-term strength at that point.

The Titebond II, on the other hand, was still tacky. It had started to set, but it had not fully cured in the same way. It was past the point where I would expect to just press it back together and keep going, but it was not truly cured.

So in terms of fast clamp time, the polyurethane glue clearly came out ahead.

That does not automatically make it the better glue overall. Fast cure is only one part of the story, and ultimate strength is a separate question. But if quick clamp time is what matters most, the polyurethane glue does have a real advantage here.

And yes, if speed is the only goal, CA glue is even faster. But CA adhesives are weak in shear, so that comes with a tradeoff too.