glue type

[Jan Ciesko]

I’m trying to identify what glue was used to install these aileron control horns - please see pic attached. It looks really nice, and I have a similar wing where I’d like to replicate that.

Any tips?

Hope to see you all soon.
Thanks in advance
Jan

Sent from my iPad

[Richard Shagam]

Looks to me like a urethane glue--Gorilla glue, maybe?  I'm not sure if Gorrilla glue hardens smoothly and shiny, however. Or epoxy with some filler--possibly microballoons--that has yellowed with time.

Richard Shagam
Albuquerque, NM

RNSh...@rhizotech.net 

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[STAN JOHNSON]

Two thoughts.  A 2 part epoxy with something like micro balloons for a filler.  There was a German company that had a polyester based glue that was a resin base with a powdered hardner..  It was something recommended in the instructions in some German kits I saw in the 1980's.  I think it was formulated especially for fiberglass parts which looks to be what the control horns are made from.  I think the company was named Uhu.  I looked on the net for it and found all manner of Uhu glues, but not what I remember .

[Carris Mike]

Looks like epoxy with a filler of some sort.  If you do not have micro balloons and a good resin system, I think even 15 minute epoxy with some balsa dust used as a filler would work well.

[STAN JOHNSON]

Jan,

One more thought. Years ago the word on the street was epoxy resin glues would not bond well to polyester (fiberglass) resins. Since then I believe there has been epoxy resins formulated to bond well to polyester resins. The glue I mentioned from Germany was designed to bond well to fiberglass parts. It might not be available any more. A better plan might be to use fiberglass resin mixed with milled fiberglass powder to glue your fiberglass control horns to whatever structure you are working with. If that is what you are working with.

Stan

> On 11/06/2025 10:12 PM MST Jan Ciesko <jan.c...@gmail.com> wrote:
>
>

[Albertus de Wet]

I have this epoxy from EU - I think it's from Germany, originally.

I have some available if you are still interested.

Bert

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[Dan Tandberg]

I am pretty sure it is this.  Let me know if you want to use some of mine.  It seems to be no longer available.    https://www.amazon.com.be/-/en/Pattex-Stabilit-Express-80g-2-Komponenten-Kleber/dp/B0000WPL8O?language=en_GB

[Dan Tandberg]

I use 30 minute hobby shop epoxy plus a bit of milled fiberglass for my horns.  I have yet to have a failure even on my largest models.   

[Ward]

If you can put your fingernail into it I’d bet it’s 5 minute epoxy with microballoons…,

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On Nov 7, 2025, at 2:49 PM, Dan Tandberg <tandb...@gmail.com> wrote:

I use 30 minute hobby shop epoxy plus a bit of milled fiberglass for my horns.  I have yet to have a failure even on my largest models.   

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<fail-train-wreck.jpg>

[Dan Tandberg]

I was taught never to use microballoons in epoxy for any high-stress joints. Only use them for applications where you are trying to save weight, like fillets.  For joints like control horns on control surfaces,  milled fiberglass makes them stronger, though less flexible.  I   

[Dan Tandberg]

Jan, I am still trying to figure out why you want to duplicate those sloppy ugly heavy un-aerodynamic gloopy horn-surface joints.  It that were my model, I would remove the horns and do them right!   

[Carris Mike]

100 percent correct Dan.

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[Jan Ciesko]

Interesting responses all. Thanks!

It feels very solid, I cannot make any sort of imprint on it with my fingernail.

Maybe some sort of Gorilla glue and filler? I still have the fiber glass filler from you Dan. I can experiment.

I’ve lost a wing on an airplane in the most impossible way: while packing and with hands full, I’ve placed one wing on the roof of my smaller car parked in front of my garage. I proceeded then to pack other stuff and haven’t noticed that my in-law had decided to go for a swim. He drove off with the wing. :)

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[Richard Shagam]

My brother in-law did the same with my handheld GPS unit--he left it on the roof of his car.  Moral:  never trust brothers in-law with your stuff!!

Richard Shagam
Albuquerque, NM

RNSh...@rhizotech.net 

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[Jan Ciesko (private GMAIL)]

Haha, yes, now that you mention, I've left a small DJI drone on the roof a few years ago and I couldn't find it for two weeks. It was there and moved between the bars of the roof rack. 😁

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[Dan Tandberg]

When I was practicing emergency medicine, I was quite scared of all the drunk, drugged, intellectually challenged drivers on the NM roads.  So I drove excessively slowly to work and other places.  Many days I got to the UNMH parking lot and found my steaming mug of coffee still securely on the roof of my vehicle!

[Bill Becher]

This looks like an industrial epoxy glue made by  Henkel/Loctite/Hysol.

I used it with an applicator gun because of it's long working time and strength.

See https://www.hardwarespecialty.com/Product/1155537

Bill 

[STAN JOHNSON]

Back in the 1960's an adult modeling Buddie of mine used some kind of gray colored epoxy to change the port timing on his McCullough Go Kart racing engines.  If memory serves it was a Hysol product.  It held up to the heat of combustion as well as a piston running over it at thousands of RPM.

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[Dan Tandberg]

Jan, what did you end up doing?

Dan Tandberg, MD

Professor Emeritus

UNM School of Medicine

[Jan Ciesko (private GMAIL)]

Thanks all for the input. Took me a while to get back to this. 

I ended up with this [1]. 

Like Bill mentioned I used an applicator gun. On a reference piece I tried the strength and it seems to be bonded very well. I am happy. 

Thanks again for your help. 

[1] 3M Scotch-Weld Epoxy Adhesive DP460 

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