[TA455HO]

For me I've done the same mix twice in a row and had flat one time and glossy the next and can't put my finger on anything that changed in between. In fact the glossy was later in the day when it was warmer but not as humid so I, at the time, discounted reducer being a factor. Maybe I'll call PPG if it happens again and see what they say.

Oddly, the flat look seems more like primer should look.