[NSRCA-discussion] Fw: Epoxy Question

[Ken Thompson]

That is very true, however, it depends on the amount of alcohol used and strength required.  I routinely use thinned 5 minute for fuel proofing, never on a structural joint.

Ken
  ----- Original Message ----- 
  From: vicenterc at comcast.net 
  To: NSRCA Mailing List 
  Sent: Tuesday, November 20, 2007 10:35 AM
  Subject: Re: [NSRCA-discussion] Fw: Epoxy Question


  Didn't the master say that is not good idea to use alcohol to thin epoxy?  I could be wrong since my memory is bad.  Anyone remember?  

  --
  Vicente "Vince" Bortone

    -------------- Original message -------------- 
    From: "Ken Thompson" <kthompson at stx.rr.com> 


    ----- Original Message ----- 
    From: Ken Thompson 
    To: NSRCA Mailing List 
    Sent: Tuesday, November 20, 2007 10:13 AM
    Subject: Re: [NSRCA-discussion] Epoxy Question


    Well folks,

    Here is a preliminary finding...Considering the fact that I probably skewed the results by stirring the mixture to keep it incorporated, and the 5 minute epoxy mixture I used has only been curing for about 60 minutes, I found no detectable loss of weight on a Pelouze PS20DL digital postal scale.  I will try to attach a pic of the weight of the cup, stir stick and mixture.  
    The cup and stick weigh .5 oz, with the remainder being the mixture.  One thing you will see is that stirring the mixture makes a gelatinous mess...

    ----- Original Message ----- 
      From: wgalligan 
      To: Don Ramsey ; NSRCA Mailing List 
      Sent: Tuesday, November 20, 2007 8:51 AM
      Subject: Re: [NSRCA-discussion] Epoxy Question


      OK,  I'll take a stab.  After the alcohol evaporates you would have the same mass or weight of epoxy that you started with.  AND to reiterate what I learned from the Master Fowler, thinning epoxy, if I remember right, changes the molecular structure weakening the mixture.  It will also cause the epoxy to shrink over time. BTDT.

      Wayne Galligan

      waiting for Master to speak
        ----- Original Message ----- 
        From: Don Ramsey 
        To: NSRCA Mailing List 
        Sent: Tuesday, November 20, 2007 8:53 AM
        Subject: [NSRCA-discussion] Epoxy Question


        Breaking news.  Here's something from Mike Harrison that will be of interest to the list.
        Don


        Ok, think about this, take 1 oz epoxy and thin with 1 oz alcohol (91%).?  After curing how much do you think it weighs and tell me why.

        Mike


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