They are fabrics (glass, kevlar, graphite, whatever) that are already are 
soaked with epoxy.  You simply apply them to the surface and you are done.  
They are put on a sheet of plastic and rolled up in a tube.  The epoxy is kept 
from hardening by storing the prepreg in a freezer.  You probably won't be 
working with prepregs at home.  They are usually used in aircraft factories to 
speed up layups and keep the amount of epoxy consistent.  I worked in the 
composits lab in college and we had some in the freezer that were there 
basically just to show the students what they looked like.  

Don't ask me how they ship them and keep them frozen.

-----Original Message-----
From: Steve and Lori McGee <lmc...@maqs.net>
Sent: Oct 24, 2003 4:57 PM
To: KR builders and pilots <kr...@mylist.net>
Subject: KR>Newbie question

What exactly are prepregs?

Steve

lmc...@mqas.net


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