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Old July 8, 2008, 11:24 AM
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Originally Posted by 3.0charlie View Post
I did some more research and found that RTV510, 567, 577, 655 and 656 would do the trick. Same for the Dow Corning stuff. But no luck Bud... sorry. All those sealants are not on our Preferred Parts List within the Company. Thus they are not ordered, nor can I request them.

I even requested samples from both suppliers... and both requests were denied. First time that ever happened to me.
Thank you for trying.I really appreciate it.



And Thanks for the research.I knew there were others , but well, momentive's site is not great....the data is all there , it's just finding it.

I actually talked to someone at momentive's silicones division yesterday.
The first thing he said after I explained what I needed , was ; "None of our silicones go below -60 c".

After I told him all about his company's low temp silicones , we got down to the nitty-gritty.

He confirmed that 90% of the 2-part silicones are available in 1 gallon lots only.

He then told me pretty much the only way I was going to get a 1 pint size was by sample.He then told me something you have already just found out.They are getting reallllly stingey with the samples.

---------

Sooo.......I guess it's down to begging via email , even tho I'm totally willing to buy it.

I am going to look for a calgary division of momentive tho....GE has many offices here , I should be able to.

--------

My glass is in town !! I'll be picking it up sometime in the next couple days.

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  #52 (permalink)  
Old July 8, 2008, 05:25 PM
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It's usually rather simple for me to request some. Fill the sample form, sometimes answer a phone call from the local rep, then receive said sample within a few days... Actually I did receive a visit today from our GE rep; I tried to explain roughly what were your plans; I did show him your thread - he think you're nuts. But he also said that it's wonderful how computer builders are pushing the envelope.

As for the samples, it's a no-go due to the cost: $220 each 2-part tube (330ml)... and samples cannot be bought.

John
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  #53 (permalink)  
Old July 9, 2008, 03:00 PM
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Ok.....I'm getting closer I think.

After yakking with the local MG chemicals rep (momentive distributor) I have actually found a 2 part silicone they DO sell in 1 pint sizes.

RTV 567

Cost with shipping is over 600$.Not including primer.

Now I'm really not sure if this is the correct material or not.It seems like it'll work , but im unsure of it's mechanical properties/materials compatibility.....

From my reading it seems to me the ideal RTV would be RTV 511 but it's not available in the 1 pint size, AFAIK.....

------

3.0Charlie : I'm curious if there is a "sealant/adhesive expert" where you work that might be willing to answer a couple questions for me.

-----

I'm going to look into the dow products in a bit more depth.I'll put up with a -80c limit if it's cheaper.

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Old July 9, 2008, 03:44 PM
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Those silicones are all part of the same family; they should all work. Yes, we do have a Materials and Processes Expert at work - he's specialised in adhesives too. Unfortunately he's out on Holidays for 3 weeks... but still shoot me a PM with your questions and as soon as he's back, I'll fire away.

From the research I did over at Dow, I found that their silicones are good down to -65C.
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Old July 9, 2008, 05:13 PM
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Cool .

Yea the Dow Corning site is the same as the Momentive one.If you don't know exactly what you are looking for , you wont find esoteric stuff....The link you posted about the DC 3-6121 definitly shows an operating temp of -80 c .

Now Dow Corning lists themselves as 'Silicone Experts' . I'd bet 5$ right now they have a competing material.I've email'd em again.

Thanks again John...PM on the way , after chores.
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Old July 9, 2008, 05:39 PM
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Quote:
Originally Posted by BrainEater View Post
The link you posted about the DC 3-6121 definitly shows an operating temp of -80 c .
Yeah, I know... in my little mind I meant that aside from the 6121, most silicones are for -65...

You probably will find similar products at DC, but I couldn't find any others that were certified for -80C.
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Old July 11, 2008, 08:03 AM
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I must say, this is above and beyond BrainEater. Thanks again for the waterpump, she works like a charm.

Your project is certainly making me itch to come up with something to rival yours. GOOD ON YEA.

Live Long and Overclock!
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  #58 (permalink)  
Old July 11, 2008, 11:15 AM
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Hehe thanks....Cheers ! ( I'm enjoying one of those beers right now.)

Have you figgered out what that 2 pin connector is ?




----------

I should have a fairly major update sometime later today.....

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Old July 11, 2008, 11:43 AM
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Nope. Anyone know what the 2 pin connector on the back of a Swiftech MCP650 pump does?

This project of yours is giving me ideas to rival yours... gah, I just spent enough money already...
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Old July 11, 2008, 02:00 PM
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Originally Posted by chibi_man View Post
This project of yours is giving me ideas to rival yours... gah, I just spent enough money already...
Heh.

I have bad news.If you wanna play in this league , Be prepared to spend cash like it's going outta style.I am just learning this lesson the hard way.Aerospace grade is no joke.

---

Update time.

I have my glass :



Yep.....looks like glass....Haw.

There is actually a major difference between this and plain old float glass.I could hold a blowtorch to this glass , or dunk it in LN2.That's something regular glass just does'nt do.....

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I purchased the actual switches for the rack ;



Quick note about these switches.These are actual 'safety switches' , not the crap knockoffs you can get from modding sites.They are rated 3/4 HP 277v/15 amp .

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I'm about half done on the grinding of the res tank inner.

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I have painted all the MDF panels seen earlier in this post.....

-----

More soon.

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