What is the best heat and moisture resistant adhesive?

Question

I have to join metal to metal (Aluminium or SS piece onto a vertical SS wall) that could take a shear load of say, 600gm with an area of contact of around 2cm^2. The environment is above boiling surface of water. So, the adhesive should be resistant to 100 deg C temperature, and moisture – with water droplets. Check the image for setup. What are the best adhesives for this purpose? I have checked Araldite, but specs say its max temp is around 65 deg C. Any suggestions? Also desirable is if the adhesive is semi-permanent: If I need to remove it and make the joining at any other location, it shouldn’t be terribly difficult.

GisMofx · Answer

You want to look at high temp RTV silicone adhesives. They can handle temps way above 100c. Typically found and used as make-a-gasket material on engines and commonly found at automotive stores.

Also, I'd like to see you use SS for the bracket to keep your thermal expansion co-efficient the same as the base part..I know it's not a lot of temperature change but it may help.

Lastly, I second the fasteners method per the comments because you will have a captured connection between the two parts.

What is the best heat and moisture resistant adhesive?

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