On 24 Jun, 12:35, "Tim Downie"
wrote:
I have a silcone rubber "dog tag" that I'd like to put my name and phone
number on for ID purposes should I drop dead during a run. (Ever the
optimist ;-))

On one side its got moulded or perhaps laser engraved text but the other is
flat. *Is there anything indelible that will work on silcone rubber or is in
possible to get it "engraved"?

Tim

Use a pen designed for writing on overhead projector acetate slides,
they'll write on anything - I would guess Rymans would have them.