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glue compatability

Posted By:
Bruce MacDonald
Homebuilder or Craftsman
2
Posts
0
#1 Posted: 10/17/2010 04:01:07

Has anyone experience of regluing with epoxy ,wood that was prevously glued with resorcinal[purple stain]. I have an Emeraude skeleton that has been a project for a long time,recently purchased it and found gussets in the ribs were not 100%. Looking forward to any help.



Ray Ordorica
Homebuilder or Craftsman
36
Posts
1
#2 Posted: 10/21/2010 20:01:49

 In the restoration of my Dalotel I have found many failed glue joints that were originally stuck together in France, in the 1960s, with a white plastic resin-type glue, and some with Resorcinal. My technique for regluing any joint is to scrape both mating surfaces with either rough sandpaper or a sharp-edged object like a chisel. I am regluing everything with West System epoxy (105/205) and always make break-apart test strips to break later. You might be able to do a break test with some salvaged samples from your airplane to see how well your joints hold up. As long as you expose some of the bare wood beneath the old Resorcinal I believe the epoxy will work well. Hope this is of some help to you. Any sort of restoration is an agonizing process, as you are finding out.

 ......Ray O



RayO
Jonathan Tibbets
Young Eagles Pilot or VolunteerHomebuilder or Craftsman
7
Posts
0
#3 Posted: 10/22/2010 08:42:24

Hello Ray,

I am restoring a Corben Baby Ace with wooden wings. I had the same problem with broken joints on the ribs. The glue used was white cassien glue, no resorcinal, the white glue was very brittle and I ended up removing all the ribs and sanding off all the old glue. This probably is not too helpful but the bond using epoxy is only as good as the bond on the coating of glue between the epoxy and the wood. I agree with other responders that it would be best to remove as much of the old glue as possible before re-gluing with epoxy.

Jonathan Tibbets



Bruce MacDonald
Homebuilder or Craftsman
2
Posts
0
#4 Posted: 10/22/2010 13:13:30

Thanks Ray and Jonathan,I am sure the job will be interesting. At least I have a flier while constructing.   .....Bruce Macdonald.