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High-Temperature Adhesive for Hotplate

02/15/2008 5:25 PM

I have a hotplate (0°C to 350°C) with a temperature sensor that needs to be re-attached to the plate that heats. The adhesive should be non-conducting, keeping the sensor's 2 electronic leads isolated from each other.

What adhesive would fit these requirements?

Thanks,
CR4_Infoseek

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#1

Re: High-Temperature Adhesive for Hotplate

02/15/2008 5:44 PM
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#3
In reply to #1

Re: High-Temperature Adhesive for Hotplate

02/16/2008 8:36 PM

YOU MEANT THIS:

High-Temperature Ceramic Putty
This aluminum oxide-based ceramic putty adheres to all porous surfaces and can be used for thermal insulation on most materials. Withstands continuous temperatures up to

2300° F and resists molten metals and most chemicals. Can also be used for instant repairs to brick, mortar, burner blocks, insulation, furnace holders, and thermocouples. Begins to harden in 20 minutes; reaches full strength in 48 hours at room temperature (2-4 hours at 250° F). Color is off-white. The 11-oz. cartridge fits a standard caulk gun.

Size

Each

4-oz. Tube
7551A23

$13.02

11-oz. Cartridge
7551A2421.35
1-gal. Container
7551A26103.79
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#9
In reply to #3

Re: High-Temperature Adhesive for Hotplate

02/18/2008 1:12 PM

I noted the phrase can be used for thermal insulation . I would not use this between the thermocouple and the hot plate. There would be a temperature loss between the two which means the thermocouple would be inaccurate. Now if you could hold the thermocouple on the hotplate and cover it with this stuff, it would probably work.

Bill

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#2

Re: High-Temperature Adhesive for Hotplate

02/15/2008 6:09 PM

Sauereisen cement will do it.

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#4
In reply to #2

Re: High-Temperature Adhesive for Hotplate

02/16/2008 10:58 PM

Surely will.

So also will Fireclay putty

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#6
In reply to #2

Re: High-Temperature Adhesive for Hotplate

02/17/2008 1:58 PM

Used Sauereisen Cement for just that purpose 35 years ago.

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#5

Re: High-Temperature Adhesive for Hotplate

02/17/2008 7:24 AM

Any of the adhesives mentioned will do a fine job. You should drill a hole in the hot plate(if there isn't one already) at least 10 thermocouple diameters deep and pack the thermocouple in the hole (which is called a thermowell) with the adhesive. This will provide improved accuracy and will minimize tensile stress on the adhesive.

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#7
In reply to #5

Re: High-Temperature Adhesive for Hotplate

02/17/2008 3:03 PM

If you just need a downhome solution,get some muffler assembly paste from your auto parts shop.It sets like a rock,sticks like **** to a blanket, and in thin layers doesnt bubble up. I use it to repair hotties from hair straighteners to IR heating elements.

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#8

Re: High-Temperature Adhesive for Hotplate

02/17/2008 4:12 PM

Try the one that is most often used in this type of application (and also one of the oldest adhesives around)--- Sodium Silicate. It is most commonly available as the liquid part of muffler patch, fireplace brick adhesive, fireplace crack patch, boiler rope insulation adhesive, etc. It is available in small pouches, 1-2 oz tubes, 14 oz cartridges, all the way up to tank wagons and tank cars.

Its usually applied with some clamping or other method of keeping the item to be glued in place until it sets. Low heat applied for several hours to solidify the adhesive and then high heat applied overnight to cure the adhesive.

Good luck,

old salt, a former adhesives plant manager

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