Tamiya 2 part epoxy putty

[Classicgas]

Has anyone used this? How do you mix it correctly? How hard does it get? Shrinkage? Time to dry?

[Bainford]

I've been curious about this stuff, too. Being an epoxy, there should be no shrinkage at all.

[Mark]

Looks like most other epoxy putties.  Mixing involves taking equal quantities of parts A and B, and kneading them together until the mix is a consistent color, with no streaks or spots visible.  I haven't tried the Tamiya putty as I am using another two-part epoxy putty, however the Tamiya product should be perfectly good.

When storing any two-part product, keep the individual parts in sealed bags, separate from one another.  When using it, never let tools or mixing implements come into contact with both parts.  Even the smallest amount of one half will start the other half to hardening over time.  

[NOBLNG]

It is basically the same as the Milliput fine. They both get rock hard when fully cured. I used Milliput on this roof.  From my thread on them: “The Milliput is rock hard and sticks well. The Tamiya is still a little soft (I can dent it with my fingernail) but seems to adhere as well or better than the Milliput.” That was after 2 days if I recall and the Tamiya had soon hardened up as well. They both file and sand nicely. They could possibly be carved with a hobby knife.

Edited January 2, 2023 by NOBLNG

[Classicgas]

Can it be formed while soft with your finger and alcohol?.

[NOBLNG]

I don’t know about thinning the Tamiya stuff? The Milliput can be made softer with a touch of water. I would wear vinyl or nitrile gloves rather than bare fingers for mixing it. It can be easily sculpted while soft and sanded or filed or drilled when hardened. Since it cures by chemical reaction rather than solvent evaporation, it has little or no shrinkage. The Tamiya does seem to be a tad harder now than the Milliput. The JB Kwik in the picture has never gotten hardened.

Edited January 2, 2023 by NOBLNG

[stitchdup]

I'd get milliput simply for the bigger pack. Its great stuff and can be used as more than just filler. Some cheap clay sculpting tools are useful if you're using it to make bodies and to smooth just wet your fingers

[robdebie]

I always mix two-part epoxy putties by squashing the components with a blade knife, a few times, until they are mixed nicely. I would recommend to minimize skin contact, since epoxies are known to cause allergic reactions with maybe 10% of people. Kneading with your bare fingers doesn't sound like a good idea to me, in the long term.

Rob

[NOBLNG]

On 1/1/2023 at 5:21 PM, Classicgas said:

Can it be formed while soft with your finger and alcohol?.

I was curious myself and it seems that water can be used in very tiny amounts with the Tamiya epoxy as well. Here’s a really long video on a very short topic.? He finally starts mixing the epoxy at 8:38 into the video with his bare fingers which I wouldn’t do.

https://www.youtube.com/watch?v=ENn8h6LCHWg

 

Edited January 4, 2023 by NOBLNG

[dbostream]

I am using the smooth surface version and it never gets properly hard. After almost a week I can make dents with a pointy object. Don't know what I am doing wrong.

[NOBLNG]

5 hours ago, dbostream said:

I am using the smooth surface version and it never gets properly hard. After almost a week I can make dents with a pointy object. Don't know what I am doing wrong.

Is either part hard or crusty? Perhaps you have an old batch, but it does have a pretty long shelf life as long as the parts are kept separate. You should be able to roll each part into an equal sized ball, then mix the two equal parts together by kneading them. A drop or two of water can be added if it is too stiff to mix. After a week you should not be able to dent it with a fingernail and it should file and sand nicely.