Are you sure its not the actual substance that is disintegrating leaving a
film of the rubber on the substrate? This will never glue back as all that
will happen is another layer of powdered perished rubber comes off.
Its a bit like foam backed carpet or worse those sticky plasticized
coatings one gets on binoculars.
Brian

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"newshound" wrote in message
o.uk...
On 16/06/2019 11:16, Mike wrote:

My mobile phone has a "rubber" casing fixed to its plastic body, which
is coming unstuck. The internet says (so it must be true) that the
casing is TPE. I say that Evostik doesn't adhere to it. Has anyone
succesfully glued TPE onto a rigid substrate? With what?

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TPE is a bit of a blanket term that covers a range of materials. Provided
there isn't too much "peeling" force on it I would expect an "evostik"
type product to work, or possibly superglue.