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High temp Adhesive/Protectant

High temp Adhesive/Protectant

High temp Adhesive/Protectant

(OP)
Hi,

Does anyone know a High temperature (350-400 F) adhesive and protectant I can use for a simple strain gauge on steal?

Most of the time I can just use some form of super glue for an adhesive, can not for high temperature.

As for a protectant I can normally can just use electrical tape or silicone rubber to cover the strain gauges after they are assembled. In this application I can not use tape because of temperature limitations and I can not use any form of silicone because the full assembly involves DC brushed motors that could be adversely effected.

Any suggestions would be greatly appreciated.

RE: High temp Adhesive/Protectant

There are epoxy adhesives that will withstand 400 °F exposure. Polyurethane sealant is probably the best bet for that temperature, while avoiding the silicone problem for electric motors. You should contact adhesive and sealant manufacturers for their recommendations: 3M, Henkel Loctite, Devcon, MasterBond, Sika, ThreeBond, et al.

RE: High temp Adhesive/Protectant

(OP)
Aremco is all custom. I am looking for off the shelf.

Masterbond, 3M, Loctite all didn't have a quick answer for me. waiting for response though. I will keep calling around as I was though.

RE: High temp Adhesive/Protectant

bicky,

Your temperatures are a bit above what we deal with but we've found some of the Masterbond products work at fairly high temperature & when exposed to solvents.

Their website list several candidates for your temperature range and above

http://www.masterbond.com/applications/bonding-ste...
http://www.masterbond.com/properties/high-temperat...

The only thing I'm not sure on is if the thickness/properties of these adhesives will work well for your application on strain gauges.

Posting guidelines FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm? (probably not aimed specifically at you)
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?

RE: High temp Adhesive/Protectant

Sorry for chain posting, but I've also found that:

(site in Polish): http://www.kreocen.pl/produkt/Astat-ALC5010-Tasma-...

It,s aluminium adhesive tape, which can resist temperatures over 250*C (482*F) used for insulating fireplaces flues.

RE: High temp Adhesive/Protectant

(OP)
KENAT:
I am working with their applications engineer now, so hopefully something will work.

MateuszM:
No, cant have silicone. The second one I also cant use because it is conductive. (I didn't mention anything about conductivity in the post, that was my bad)

RE: High temp Adhesive/Protectant

I know that plenty of strain gage testing is done at those temperatures. You should be contacting strain gage companies about this application, not random adhesive suppliers. Have you checked Omega Engineering?

RE: High temp Adhesive/Protectant

(OP)
Omega has some high temp epoxy I can use, isn't cheap, but my have to due.

Still waiting back on the protectant, again no quick answer for me.

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