Epoxy glue review.

Review on: Advanced Adhesives 3290 and the Loctite EA 9483 heat resistant epoxy .

You (all my thousands of followers:) probably remember my last week post about how to built a glue gun.

Today is a follow up post to review the two different glue that I used.

As I mention in the last post. I needed a high heat resistant epoxy glue to help me fixing  the wooden handle to the tang of my knife, using brass pin that run from side to side on the handle through the blade tang.

I started with the: Advanced Adhesives 3290. It offer heat resistance up to 200 degrees Celsius and a great deal of strength.

It is a two component glue, and I used the factory recommended mixing standard (Green) nozzle to mix it. Since it was my first time working with that glue, I first squeezed 4cm length of mixed glue  on peace of scrap wood. I let it cure as in the instruction and the glue set dry properly.

When dry and cure it is rather of-white in colour but, I was happy with that.

Next I was using it to fix my brass pin (see my last post for more details on that). I waited the recommended curing time, than I checked the result. the first thing I notice was that oxidization started on the brass pin. The glue wasn’t fully cure and was still wet. I left it for another two days  but it didn’t cure.

I scrap the pin that I been trying to glue into the knife handle, and start over with new brass taking great care to clean it properly before applying the glue (I used acetone). It didn’t work. the glue shows the same symptom as before.

I contact the manufacturer to see if my method of applying the glue was wrong. They suggest that the gun the I used didn’t dispense the glue’s two component exactly at 1:1 ratio, although they said that the glue will cure even if the ratio is not 1:1 and there is a degree of tolerant in the quantity of the two components.

In the photo below, the nails are levelled to each other, indicating that the dispensing rate was correct.

Epoxy glue review

I sent them the original brass pins and the wood that I been using. They say that they tried  gluing the pins to the wood and succeed with it.

I did try to be more scientific about it. I did mini experiment.

I used another glue, Loctite EA 9483.

Here some technical info about it:

Working time: 25 – 60 min.

Fixture time: 210 min.

Viscosity in Pa-s: 7

Tensile strength: 47 N/mm²

Peel strength: 1.5 N/mm

Service temperature range: -50°C – +150°C

Colour mix: ultra clear

The experiment

I use the two glues to glue the exact brass pin that I use on my knife. I spread four blobs of the glue (two for each glue) on piece of wood from the same wood I used for the knife handle. I then stick the pins, one on each type of glue. I use my wooden glue gun to apply the glue and in both cases I use a proprietary mixing nozzle. I left it for the recommended curing time and checked.

Epoxy glue review

 

The glue on the right is the Advanced Adhesives 3290 and the Loctite EA 9483 is on the left side.

On the right end side of the wood, you can see the greenish oxidization residue formed on the pin brass,  Also notice that the glue is crumbling where it touched the brass. The glue on the left seems to cure properly. The surface of the brass pin is very smooth, so it was easy to detached it from the glue, but you can see that the glue on the left is clear and nicely cure and the one on the right is not.

As you can see both glue work good in the blobs without the brass.

Conclusion:

In spit of the manufacturer’s comment, I still think the Advanced Adhesives 3290 didn’t’ do a good job and I will not use it again for that proposes. The Loctite EA 9483 did what I wonted it to do and although it less heat resistant, it still held its integrity after  the sanding process.

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