Is Silicant rubber sealant OK at -40C? 1

[digger200]

Is Silicant rubber sealant OK at -40C?
(the standard industrial stuff)
Thanks

 

[mechengdude]

I assume you mean silicon. Generally speaking I would say yes. The McMaster Carr website lists lots of Dow Corning Silicon products and all the ones I saw were better than -40C.

 

[handleman]

I assume you mean Silicone. :-D

 

[MintJulep]

Ok for what?

Ok to use? OK to apply?

 

[deanc]

http://www.arlon-std.com/Library/Guides/ArlonSiliconeAdhesivesinSpace.PDF

How much you want to spend?

 

[digger200]

Sorry Lads, you have to be so exact on this forum.
It (the silicon)would be applied at room temp just to "stick" a nylon cover over a nut. The thing could possibly be at sometime in temps of -40C.
I was thinking of ordinary industrial sealant. The ones we have in the factory (in the UK) at the moment have nothing on the tube. I'll get in touch with the manufactures.
Thanks

 

[digger200]

Thanks for the replies, just found some local that withstands -60

 

[ScottyUK]

Post the manufacturer and part number - the information might be useful for someone who finds this thread in the future.


----------------------------------

I don't have an attitude problem. You have a perception problem...

 

[digger200]

Here you go
The silicone is from Beal (UK) Ltd. It is called Trust Seal R.T.V silicone seal. Colour : Black. Temp Range : -60 deg C to +250 Deg C

 

[Cockroach]

I have found that in valve applications, mainline block ball and gate valves, that silicone based lubricants are not acceptable. Most of my experience has been with these so called lubricants actually becoming more viscous and acting as a glue between metal surfaces. Infact, it is a horrible lubricant for cold weather engineering practices.

The same is true of teflon based lubricants. For this reason, my company recommends silicone/teflon free lubricants for pipeline valve applications. Esso's Equilube 80 is perhaps the best for low thermal applications. There are others, but you need to assess you own application, this one works the best for our valve product line as well as many of my client's needs.

My opinion, be very careful with salesmen literature. Just about anything will be said for a sale!


Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

 

[Pud]

Cockroach,

It's a sealing application - not lube.

All,

Any "common or garden" RTV silicon sealant (best clear, as in unfilled) is good for around -60 or less deg C. It's the nature of the beast!!!


Cheers


Harry

 

[CESSNA1]

DIGGER2000: Be careful when using silicone compounds as an adhesive. In general their adhesive quanlities are poor. I have seen parts come apart becuase they were held with silicone adhesive and could not take the environment for which they were supposedly designed.

Check it out first.

Regards
Dave