Europa-List: Loctite

[JEFF ROBERTS <Jeff@rmmm.net>]

HI All,
Going thru my old tool box I have two tubes of Loctite I found. One is  
648 and the other is 638. Looking on the loctite site they don't show  
there purpose. I'm assuming they're thread lockers that have been  
discontinued. Can anyone shed some light on their purpose before I  
throw them away? When I built Gold Rush I used a different brand of  
thread locker as these were all in written in German.

Thanks in advance.

Jeff R.  N128LJ Gold Rush