Brodhead Pietenpol Association

Original Posted By: jmcnarry(at)techplus.com (John McNarry)
Del... The sealant I was referring to is a 2-part epoxy that is made specifically for aircraft fuel tank sealant. I am sure there are several different trade names for it. One is Pro-Seal. Another is PRC. But then I think PRC was bought out by Aultoids. I haven't ever looked to see if Aircraft Spruce carries it. It is dark brown (almost black) in color. I will look up the specs we have at Learjet and see which part number is recommended for aviation fuels. It may be different for avgas & car gas as opposed to what we use for JetA. I remember from using it on piston twin cessna fuel cells that we could get it in two different versions. PRC 890-B2 or PRC 890-B1/2. The half would set-up in about an hour...and cure took about 8 hours when under a heat lamp. The B2 took longer to set and around 24 to 36 hours to cure. I imagine it is expensive stuff...but man it is good stuff. Those twin Cessnas were more than 20 years old and the sealant was still as flexible as new. Cessna used it in many other locations too.... for example it is used as the sealant for the pressurized section of the cabin. Sometimes we had to remove it in certain places to get access or make repairs. Paint stripper didn't seem to phase it so our only method was to use a wire wheel and remove it mechanically. Makes a huge mess. Also, glass bead blasting parts which have that stuff on doesn't work either. The beads just bounce off. That stuff was like trying to peel the hyde off of a pig. Terry B________________________________________________________________________________

Original Posted By: LaurenMWilliams(at)webtv.net (Lauren Williams)
Just a memory from the back of my mind, but I think the aluminium gastank sealers being talked about cannot be used when the gasoline is mixted with alcohol. Also called Oxygenated gasoline,,, I think,,, as the alcohol will melt out the 2 part epoxy sealant in the aluminium gastank.>From: BARNSTMR(at)aol.com>Reply-To: Pietenpol Discussion >To: Pietenpol Discussion >Subject: Re: alum gas tank - sealant>Date: Sun, 03 Oct 1999 23:31:35 -0400 (EDT)>>Del...> The sealant I was referring to is a 2-part epoxy that is made>specifically for aircraft fuel tank sealant. I am sure there are several>different trade names for it. One is Pro-Seal. Another is PRC. But then >I>think PRC was bought out by Aultoids. I haven't ever looked to see if>Aircraft Spruce carries it. It is dark brown (almost black) in color. I>will look up the specs we have at Learjet and see which part number is>recommended for aviation fuels. It may be different for avgas & car gas as>opposed to what we use for JetA. I remember from using it on piston twin>cessna fuel cells that we could get it in two different versions. PRC >890-B2>or PRC 890-B1/2. The half would set-up in about an hour...and cure took>about 8 hours when under a heat lamp. The B2 took longer to set and around>24 to 36 hours to cure. I imagine it is expensive stuff...but man it is >good>stuff. Those twin Cessnas were more than 20 years old and the sealant was>still as flexible as new. Cessna used it in many other locations too....>for example it is used as the sealant for the pressurized section of the>cabin. Sometimes we had to remove it in certain places to get access or >make>repairs. Paint stripper didn't seem to phase it so our only method was to>use a wire wheel and remove it mechanically. Makes a huge mess. Also, >glass>bead blasting parts which have that stuff on doesn't work either. The >beads>just bounce off. That stuff was like trying to peel the hyde off of a pig.>Terry B>________________________________________________________________________________