High temp epoxy

[Tony Stillman]

Gray:

Good info!  It sure is great to have people with various backgrounds to help the rest of us with these kinds of problems!!!


Tony Stillman
Radio South, Inc.
3702 N. Pace Blvd.
Pensacola, Fl 32505
www.radiosouthrc.com
800-962-7802
  ----- Original Message ----- 
  From: Gray E Fowler 
  To: discussion at nsrca.org 
  Sent: Friday, September 06, 2002 8:42 AM
  Subject: Re: High temp epoxy



  First, NEVER dilute epoxy adhesives with anything. If you do you will end up with the epoxy plus the crap you put in as a finished product resulting in an incomplete reaction which equals lower strength, lower temperature resistance and lower chemical resistance. This is not "glue".  Second JB weld does not come close to the temperature requirements of an exhaust system. Whats epoxy does? Not too many that cure at room temp. Metal (aluminum powder) does not increase the temperature resistance, only keeps the adhesive from softening as much as a non filled version. 
  The best bet for your application is Hysol 9394. This adhesive cures at room temp and then with an elevated post cure can withstand 350F continuously.  Heres how to get some free........everyone remember this-trust me it works. 

  First make up a fake company name ( or if you can use your real company name).  Log onto www.dexteraero.com get the contact info closest to where you live.  Call and say that you are investigating high temp epoxy adhesives and are bonding and conducting Lap shear tests at 300 and 350F. Your analysis says you need about 1000 PSI of shear strength at 330F-ask for Hysol 9394. You are bonding 3 different times and only need about 100 grams for each time. They will send you 3 pre-weighed mixing semco cartridges. If they start asking you questions that you cannot answer prentend to be new on the job and where told to do this, or better a supply chain management person-they buy everything without knowing anything......Hysol will send these as free samples. If you are worried than you can by these cartridges from from the local distributor for about $35 each or get a quart for about $75. 

  Now if there is a Hysol rep on this list then NEVER MIND.......It all for the promotion of pattern.......



  Gray Fowler
  Principal Chemical Engineer
  Composites Engineering 


       "Ihncheol Park" <PatternFlyer at msn.com> 
        Sent by: discussion-request at nsrca.org 
        09/05/2002 10:21 PM 
        Please respond to discussion 

               
                To:        "NSRCA" <discussion at nsrca.org> 
                cc:         
                Subject:        High temp epoxy 



  What kind of epoxy can handle exhaust temperature?
  I need one to fix my ES carbon pipe, but could not find one today.  I went
  to local Schuck's auto part, they only had something with metal in them.  I
  have lots of JB Weld, but am trying to find clear epoxy.
  Any suggestions?

  Ihncheol Park
  1973 White Ave., #402
  Moscow, ID 83843
  (208) 883-7882 Home
  (208) 661-5018 Cellular
  PatternFlyer at msn.com

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