What prime do you use? Do you buy same one as screed your using ? I tend to buy balls p131 and Ardex P51.
I use p131 as thats what im given, if I do private work or had a choice id use p51, ardex primer is the nuts
Don`t like 131, but find 121 ok I normally use the Instarmac multi primer, as i`normally using there screed. I try and use the same primer as screed, but will use whatever I have.