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Old 02-27-2009 | 11:42 AM
  #10  
LunaSea
 
Joined: Nov 2006
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From: Jacksonville, FL
Default RE: p.v.a. or c.a.

I have been using PU glue (such as Gorilla Glue or Elmers Polyurethane Glue) for the last several kits that I have built (from a .40 sized P51 thru 1/4 scale warbirds). I really like the PU glue as it expands (foams) as it cures and fills any gaps in the joint, grips like iron, and remains slightly flexible after curing (which I believe makes joints less likely to fail over time from vibration or minor impacts). It is also GREAT for skinning foam cores, laminating, and for mounting hinges (search these forums for specific articles). I still use some CA (mostly for stregthening balsa wood around a mounting bolt) and some epoxy (mostly for fuel proofing or fiberglass) and some PVA (it's tack time is less than the PU glue). It does take a bit of "learning" to use PU glue as it only takes a very small amount. It can be "kicked" by slightly moistening the wood (use an old CA "kicker" spray bottle with water and apply a light mist to the part before glueing).

PU does have a "down side". It will begin to set up in the bottle because of air (humidity) exposure. Best to transfer a small amount into a different, small squeeze bottle or syringe for use and keep the bigger container tightly sealed.