my experience has been that the viscosity of the Gorilla wood glue deteriorates (gets thick and gunky) within 2-3 months of opening the bottle. Not so bad if you buy a small bottle and use it quickly but I buy my wood glue in big bottles! I've thrown away too much of it to ever spend my money on it again. I do live in FL and this was over the summer months so it's possible it was heat related but that's the world I live in. I'll stick with Titebond which hasnt done that on me.
Epoxy is generally considered to be stronger than PVA, although it is more expensive. Most of the time, epoxies with a shorter work time are used for bonding, while the ones with longer work times are used for filling (think river table top) or finishing. One other advantage that epoxy has over PVA, is that it can be tinted with either crushed mica or dye.
To me the best viscosity really depends on how tight of a fit the pieces are. Less viscous seems to work better with tighter fitting joints since it penetrates into the wood grain easier. With higher tolerance joints though, the watery glue doesn’t stay together enough to bond the pieces together.
Cure time is not the same as clamp time. Clamp time is the minimum time that is needed for the glue to hold without separation, assuming that both sides of the joints were properly prepared. Cure time is the minimum time needed for the glue to achieve a safe working bond. You can release clamps in about 30 minutes but you will still need about 24 hours before you can work with the wood again without treating it like a newborn baby.
I would like to see a comparison between Titebond lll and Gorilla "ultimate" wood glue. I use both. Gorilla is very thick and, like you said, Titebond is slippery.
I have made a number of them and always use Titebond II. Wood cutting boards should never be submersed in water, so there’s no need for a truly waterproof glue.
You talked about "30 minute cure time", but I think that is a mistake. From what I've been seeing/hearing, glue needs 20 minutes to "dry" well enough to hold, but 24-48 hours to fully "cure" which give it its strength. As you see from your tests, a "cured" glue is stronger than wood, and 30 minutes dry glue is only good enough to continue building your project. I've been binge watching you today after YT suggested you earlier today. I've joined your FB and guild and look forward to learning more from you.
I appreciate the testing of the materials, but that was not a proper shear strength test. I'm a structural engineer whose conducted lab testing on materials in graduate school. You need to isolate the shear loading in your samples. The way you conducted this test, you are loading the samples in shear and bending due to the cantilever and distance from strike point. In order to properly test them in shear, you'd need to restrict bending. The easiest way to do this is by getting as close to the support as possible. Since that's not necessarily easy to do, you can sort of work backwards by increasing the depth of the sample, which in turn provides a greater distance to develop shear stresses and significantly increases bending stiffness. You are minimizing bending this way but not totally eliminating it. Another thing to note is that your primary stresses are perpendicular to the grain, which is the weakest direction. So it's to be expected that the wood would fail instead of the glue. Instead, try orienting grain parallel to loading direction in order to test a side grain glue up, which is the typical glue face used in woodworking.
@@rfehr613 very true. But tbh. He’s demonstrating glue strength. He’s giving us a basic idea. Your description is mere waffle to the layman. You are not in class now my dear friend
@Levendisjeagiapimou i put it in layman's terms. Or rather, I put it in woodworkers terms. Any woodworker can understand what I'm saying, as they're very familiar with the differing material properties based on grain direction. This test isn't testing glue strength due to the fact that it was setup in a way in which the wood cannot resist the stress and will always fail first. That's actually my entire point.
Was it very scientific? No, but it was good enough to show what wood workers need to know. It sure wasn’t the ultimate glue test though as the clickbait was stating.
You did the test wrong. You should have cut the wood against the grain instead of with the grain so the wood itself is strong enough to do the test. I cannot believe you did this bad of a test
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A few grains of table salt on the glue before joining the timber together stops it sliding when clamping. My grandfather taught me this 40 years ago.
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Excellent testing & review!
my experience has been that the viscosity of the Gorilla wood glue deteriorates (gets thick and gunky) within 2-3 months of opening the bottle. Not so bad if you buy a small bottle and use it quickly but I buy my wood glue in big bottles! I've thrown away too much of it to ever spend my money on it again. I do live in FL and this was over the summer months so it's possible it was heat related but that's the world I live in. I'll stick with Titebond which hasnt done that on me.
how does epoxy compare with pva glue on wood the quick dry and slow dry types of epoxy
Epoxy is generally considered to be stronger than PVA, although it is more expensive. Most of the time, epoxies with a shorter work time are used for bonding, while the ones with longer work times are used for filling (think river table top) or finishing. One other advantage that epoxy has over PVA, is that it can be tinted with either crushed mica or dye.
When I've used gorilla glue, I've used about ½ as any other glue and the expanding stays within the joint instead of fizzing out.
To me the best viscosity really depends on how tight of a fit the pieces are. Less viscous seems to work better with tighter fitting joints since it penetrates into the wood grain easier. With higher tolerance joints though, the watery glue doesn’t stay together enough to bond the pieces together.
So which is better Titebond or Gorlla?
Cure time is not the same as clamp time. Clamp time is the minimum time that is needed for the glue to hold without separation, assuming that both sides of the joints were properly prepared. Cure time is the minimum time needed for the glue to achieve a safe working bond. You can release clamps in about 30 minutes but you will still need about 24 hours before you can work with the wood again without treating it like a newborn baby.
I would like to see a comparison between Titebond lll and Gorilla "ultimate" wood glue. I use both. Gorilla is very thick and, like you said, Titebond is slippery.
Hello, what glue would you use to make a chopping board?
I have made a number of them and always use Titebond II. Wood cutting boards should never be submersed in water, so there’s no need for a truly waterproof glue.
@@sawinery-woodworkingIs this because they bend?
If it neither cannot be stained. Can they be painted?
Both can be painted, as the paint really doesn’t have to soak into the adhesive, just bond with its surface.
You talked about "30 minute cure time", but I think that is a mistake. From what I've been seeing/hearing, glue needs 20 minutes to "dry" well enough to hold, but 24-48 hours to fully "cure" which give it its strength. As you see from your tests, a "cured" glue is stronger than wood, and 30 minutes dry glue is only good enough to continue building your project.
I've been binge watching you today after YT suggested you earlier today. I've joined your FB and guild and look forward to learning more from you.
I appreciate the testing of the materials, but that was not a proper shear strength test. I'm a structural engineer whose conducted lab testing on materials in graduate school. You need to isolate the shear loading in your samples. The way you conducted this test, you are loading the samples in shear and bending due to the cantilever and distance from strike point. In order to properly test them in shear, you'd need to restrict bending. The easiest way to do this is by getting as close to the support as possible. Since that's not necessarily easy to do, you can sort of work backwards by increasing the depth of the sample, which in turn provides a greater distance to develop shear stresses and significantly increases bending stiffness. You are minimizing bending this way but not totally eliminating it. Another thing to note is that your primary stresses are perpendicular to the grain, which is the weakest direction. So it's to be expected that the wood would fail instead of the glue. Instead, try orienting grain parallel to loading direction in order to test a side grain glue up, which is the typical glue face used in woodworking.
Too in-depth bs
@@Levendisjeagiapimoulearning isn't for everyone...
@@rfehr613 very true. But tbh. He’s demonstrating glue strength. He’s giving us a basic idea. Your description is mere waffle to the layman. You are not in class now my dear friend
@Levendisjeagiapimou i put it in layman's terms. Or rather, I put it in woodworkers terms. Any woodworker can understand what I'm saying, as they're very familiar with the differing material properties based on grain direction. This test isn't testing glue strength due to the fact that it was setup in a way in which the wood cannot resist the stress and will always fail first. That's actually my entire point.
@@rfehr613 nase kala filmou. Efgaristo
It would be better if you put the Glow behind the wood and that way we could say. The glue bottles
Try sanding
In many ways this video is not scientific. Nothing to see here people.
Has anyone ever tried using hot glue ? I intend to try it out at some point. Would be interested to get some feed back.
Not really a very good test. Not much other than opinion.
Was it very scientific? No, but it was good enough to show what wood workers need to know. It sure wasn’t the ultimate glue test though as the clickbait was stating.
You did the test wrong. You should have cut the wood against the grain instead of with the grain so the wood itself is strong enough to do the test. I cannot believe you did this bad of a test
Where can I see the test you conducted genius?
Oh, shut it John
@@piesareround What? You got triggered by that? LOL 😂