LO,
Answer to your question - same coefficient of friction as the old deck coating - as per specification and tested out to prove it. As long ago as 2004.
Incidentally, much better friction than a runway, but that's due to all that seagoing aviation on rolling wet decks expertise the USN and the USMC have got
Just to clarify - why the question? Didn't you think the team doing this stuff would have thought of it? How did you think the USN and the RN go about getting aircraft to sea? I'm not criticising, just genuinely interested as to why these sort of questions are being asked. However., happy as always to help where I can.
Best Regards to those putting the coatings down,
Engines