How quickly can I apply SPI 2k primer over SPI epoxy?

[SaSmith]

The data sheet shows waiting 48 hours before top coating epoxy with polyester primer. Do you have to wait 48 hours before applying 2k urethane primer as well?

 

[Speed Barn]

I've been told by the tech line, overnight at 70 degrees and good to go.

 

[Chris_Hamilton]

Overnight (12-16 hours) would be the absolute minimum for 2 coats. Remember too, it's70 degrees metal temp not air temp. Pushing it IMO at that. Safer to wait a full 24 hours. Anything over 2 coats needs 24 hours min.