Primer Recommendation Needed

[SignDesignLady]

We are preparing for a concrete block wall wrap job. The material being used is 3M IJ8624, supplied by the customer. It is for a school and the wall has been treated with an anti-graffiti coating. Experience has proven that this makes adhesion difficult with standard vinyl. I had a colleague mention a primer but they did not know what product to recommend. Anyone have any ideas of what should be used in this instance?
Thanks in advance for any advice.

 

[2B]

Primer 94 is the suggested one for 3M Products
no idea if it will work on anti-graffiti coating

Would STRONGLY suggest a waiver that you are not responsible
* Customer Supplied material
* anti-graffiti coating surface
2 BIG RED FLAGS

 

[SignDesignLady]

That's kind of what we had determined based on what we found online. Good idea about the waiver, hadn't thought of that.
Much appreciated.