Craig Smith wrote:

> I wonder if Copydex is the same glue as Pliobond, here in the USA.
> Pliobond is a rubber based glue, usually golden brown with some
> material that settles.  When stirred, it becomes tan colored.  It has
> a very strong solvent and is thinned with acetone.  It can be used as
> a glue or contact adhesive or as a sealer.  John, please comment.

Copydex is a pure white liquid, and comes in a tub with a brush
(horrible to use) in the lid, or in tubes (preferred).  When fresh it
is much thinner than PVA, and dries white, with a very rubbery texture
which can be stretched like elastic.

It can be used as a contact adhesive for non-porous surfaces, or spread
thinly on one surface only for leather or felt.  Excess glue can be
simply wiped away with a finger, and it does not stick to fingers once
dried.  But as mentioned, if this is done too near the joined surface
it has a tendency to pull itself out from the "sandwich" and leave the
joint with no glue at all.

Copydex has very little tensile strength, and so should never be used
for bellows.  It can, however, cope with the pressures involved when
used to glue leather to discs in organ pneumatics.

John Page