Glueing Composite to Foamex

[Martin Pearson]

Tim, sure there are plenty of other types but Penloc from Eurobond is a good adhesive for this sort of thing.

http://www.eurobond-adhesives.co.uk

[Ian Johnston]

quote Martin:

Tim, sure there are plenty of other types but Penloc from Eurobond is a good adhesive for this sort of thing.

http://www.eurobond-adhesives.co.uk

Penlock will hold it but after a few week with the two different thermo qualities of Composite and foam, you will see everywhere that was glued through the face of the composite. You need to use a flexible adhesive like, tiger seal, Trueflex etc they are a polyurethane adhesive, they flex and never harden solid, therefore wont damage the face of the composite. the White 3m VHB would also do the job very well,

[Martin Pearson]

Ian, just to confirm what you have said, are you saying that with the foamex bonded to the back of the composite sheet you will be able to see some sort of marking on the front of the board?

Have only done this a couple of times but if what you are saying is that it will show through to the front then I will have to remember that for the future. Hadn’t thought about VHB but that is probably a better option and one I will try if I ever have to do something like this again.

[Ian Johnston]

Martin,

You wont notice the glue on the face of the composite immediately, but after a month or two, with different temperature variations, The two materials will expand and contact at different rates, the Movemnet between the two planes causes the dibond etc to ripple on the face where the glue is behind it, more prominent on gloss faced sheets especially black, or buttler.
I notice it every where i go, when it’s been done wrong, Usually by somebody that has undercut me, (hot)

[Tim Painter]

Thanks chaps.

I was concerned about the different expansion rates.

Thanks for your advice Ian.

Tim.

[Jeremy Howes]

Hi Tim,
I have used 50mm lengths of VHB Double Sided Tape for this purpose, fixed in a staggered formation has adhered without rippling.

Hope this helps

Jeremy

[Martin Pearson]

Cheers Ian, I realise that there will be differing expansion and contraction rates with the dissimilar materials but I honestly didn’t think it would be noticeable on the front the way composite board is constructed.
Will have to look out for that in future and at least if I ever get a job like that to do I will know how to do it :lol1: