RE: RE: RE: RE: Glueing ally to ply
by Mike Bambridge - written 13/06/2011 20:55:32
Funny you should mention 3M Jim, I contacted them the other day, just awaiting their reply. Will post their recommendation when it arrives. So far, from 2 other adhesive manufacturers, I've had similar advice, i.e. an industrial strength, high heat resistance contact adhesive. However, one of them suggested using etch primer paint on the glued faces before gluing. Their idea was that this will prevent the ally corroding. On the other hand, the first firm said that the glue would do that anyway. I'm tending towards thinking that probably water seeped in between the ally and the ply due to the less than thorough way in which it was applied. More care over this stage should pay dividends later.
Jim Dolphin wrote (12/06/2011 18:24:54):
I used the 3m glue recommended by JC, not Jesus, the other one, has stayed on 22 years.
Mike Bambridge wrote (11/06/2011 20:59:08):
John Bircumshaw wrote (09/06/2011 11:17:04):
I'm no expert on glueing aluminium to plywood, but why not consider covering the body tub with vinyl over foam rubber as I did on my Midge? This has a number of advantages: it is 'vintage' in appearance, and you will save on the cost of aluminium sheet and on having the body tub painted. A good quality vinyl will be very durable (mine has lasted for 20+ years and is still in perfect condition) I suppose it is more easily subject to vandalism, but I've never had any problems in that respect.
The Build Manual gives details of covering the body in either aluminium or vinyl. I'll scan in the appropriate sheets and let you have them if that would help.
Thanks for the vinyl suggestion John. I have considered it (still have the build manuals from my first build) but I still want to use ally. I just prefer the look for the Midge.
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