<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
         <<  Lancair Builders' Mail List  >>
         <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>

Cortaulds Aerospace recently sold out their "PRC" line of sealants to DeSoto
International, a subsidiary of PPG.  "PRC", or Products Research Corp., came
up with a line of two part sealants many years ago.  There are far too many
to describe here.  Aircraft Spruce sells only one type and that is "ProSeal
890 Class B-2".
890 is a general purpose sealant for fuel (gasoline), pressurization and
faying laps.  There are specific
types available from API and others for windows, kerosene, aviation
gasoline, etc.  Class B is thick and
class A is not so thick.  The dash is 1/2, 1, or 2 and that is the working
time in hours.  I recently made my outflow bucket gasket by doing a "PRC"
release on the bucket flange to have a built in seal.  It worked as well as
any micro release.  The contents are polysulfide polymer and phenolic resin
powder with calcium carbonate and toluene.  SemaKit makes a less expensive
variety now the patent has run out.  Try it... you'll like it.
Walter Dodson

LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.