How long can I leave renderboard before rendering?

[chappleplastering]

Hi guys. Got a silicone job that needs doing, but not going to get round there for atleast a couple months, render board has been fitted for a good few weeks already, how long can I leave the boards for before I would need to prime them?

 

[Turkshead]

Hi mate, I’ve gone over carrier boards that have been up for months without any issues.