[chbot] Suitable Epoxy

[Winston Wealleans]

At 01:40 p.m. 20/10/2014, you wrote:
>Mark,
>... Did you notice anything about the water level?
>Â Baths are full of Eureka
>Winston,
>Â Have you used J B Weld submerged in hot water?

Haven't used it in water. It is hard as and looks 
like it would last well in water. Tensile 
strength of 3969  PSI.   I have some thermistors 
set in it on a 3D printer extruder nozzle. 
Thermistor is set into the female threads of a 
3mm brass motherboard standoff with a squirt of J 
B Weld. The thermistor within the brass standoff 
is then screwed into the extruder's heating 
element block. Neat and durable. The old way of 
securing a thermistor to a nozzle was by wrapping 
the thermistor and nozzle in Kapton tape. In time 
the tape dried out and ripped and the thermistor 
would wriggle and change position and give huge 
errors. Fixing in with J B Weld solved  everything.

Looks like Jaycar are out of it, but this outfit 
has 2 x 2 tube sets left $2.00 cheaper at $15.00:

Autothority Ltd
38 Mowbray Street
Christchurch
Ph: 377 4911

>Good points all.
>
>Thanks.
>
>Jasper
>
>On 20 October 2014 13:18, Mark Atherton 
><<mailto:markaren1 at xtra.co.nz>markaren1 at xtra.co.nz> wrote:
>Just been thinking about this in the bath...
>you may need to watch out for differential 
>expansion issues with a hard adhesive
>basically if the substrate, IC, and adhesive 
>expand at different rates with temperature, the 
>adhesive might damage one of the other two.
>you may be able to offset this issue by curing 
>the adhesive at 60c, so only 40c to room temp and 40c to 100c
>-mark
>
>
>At 12:34 p.m. 20/10/2014, you wrote:
>Jaycar have J B Weld - Heat resistance: 260 
>degrees Celsius, Contents: 25ml : $17.00
><http://tinyurl.com/ljgljpy>http://tinyurl.com/ljgljpy
>At 12:04 p.m. 20/10/2014, you wrote:
>I'd suggest Shoe goo. it will be superior to 
>araldite for this application in many ways. Available from sports stores.
>On Mon, Oct 20, 2014 at 12:00 PM, Jasper 
>Mackenzie 
><<mailto:jasper.mackenzie at gmail.com><mailto:jasper.mackenzie at gmail.com>jasper.mackenzie at gmail.com> 
>wrote:
>I have a few temperature sensors (SOIC8) to keep 
>submerged in water up to boiling temperature.
>Â So far I have had a whole load of failures keeping them healthy and dry.
>My next plan is to solder wires to them then encase them in Araldite.
>Is there anything wrong with this? Will I 
>discover that Araldite is not rated to 100deg.
>Â If not, suggestions please.
>All this in my bid to prove Mark wrong regarding 
>how far IIC can go reliably (so far he has been right... still suprised 8)
>Jasper
>
>
>
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