Recommended glue for glueing plywood to MDF? - diyAudio
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Old 27th February 2014, 12:41 PM   #1
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Default Recommended glue for glueing plywood to MDF?

Hi, am building my first diy loudspeakers.

Iv'e built the cabinets out of MDF, am using stained 3.6mm plywood instead of veneer. Can anyone recommend a glue to use? I was thinking a quick drying contact adhesive and maybe drying the glue in vacuum bags.

Any advice will be much appreciated, thanks.

Last edited by Stewart Holmes; 27th February 2014 at 01:01 PM.
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Old 27th February 2014, 12:46 PM   #2
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PVA is as good as any.
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Old 27th February 2014, 12:57 PM   #3
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PVA wood glue is easy to use and cheap. It's slight movement problem should not be an issue in your application - if you were painting the cabinet I would have said to use Cascamite.
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Old 27th February 2014, 01:03 PM   #4
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Thanks guys I'll use a PVA then
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Old 27th February 2014, 04:28 PM   #5
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My friend is veneering his plywood/MDF cabinets, is a PVA best for him too.

Thanks again.
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Old 27th February 2014, 04:38 PM   #6
AndrewT is offline AndrewT  Scotland
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End grain gluing of MDF is very unreliable, if you have any end grain exposed.
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Old 27th February 2014, 04:45 PM   #7
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PVA and veneer is probably not the best combination. For pure veneer I would use a contact or resin adhesive.
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Old 27th February 2014, 05:20 PM   #8
chrisb is offline chrisb  Canada
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Gee, I'll beg to differ on using contact cement and either raw natural or paper backed veneer - particularly if planning to use any solvent based finishing materials - ask Scott about a recent experience

There are new specially formulated single and 2 part adhesives for veneers, hide glue has been around for a while, and I've been ironing on with the same yellow PVA wood glue as for cabinet assembly for well over 10yrs with no issues (other than occasional careless layout or starving glue resulting in bubbles - but those are my fault, not the process)

Andrew, I'm not sure I got your point - all assemblies with MDF will have some end "grain" joints, whether simple butt joints, mitres, dadoes, what have you.

I use plywood myself almost exclusively, but on the few occasions where asked to build with MDF and veneer, I'll give the entire surface a thorough sanding with 80G to break through the tempered surface skin and permit better penetration of the glue for the veneering process.
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Old 27th February 2014, 05:22 PM   #9
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Thanks Andrew, do you think I should apply glue on the end grain of the MDF let it dry, sand it, then apply the plywood?

re. 'For pure veneer I would use a contact or resin adhesive',
Thanks for that I will advice him on some contact or resin.
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Old 27th February 2014, 06:48 PM   #10
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Cheers for your advice Chris I will make sure I sand the MDF before I glue the plywood.
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