Is this a case of concrete still wet?

[DHTiling]

I brush primer in .... maybe a new thread and a POLL would be better.. 🙂

 

[White Room]

Brush or roller for me, never sprayed it on.....

 

[Ajax123]

I brush primer in .... maybe a new thread and a POLL would be better.. 🙂

Agreed. No idea how to set u a poll but agreed....

 

[Rookery]

Roller for me. Its never occured to me to spray it on.

 

[bugs183]

It's a fair point about spraying and whether it is better than brushing or rollering, Mapei say you can:
http://www.lilleytileandstone.co.uk/sites/default/files/PrimerG_UK.pdf

I've never had any issues spraying, but as you say it would take no time to apply with a sprayer and then rollering over to be certain.

 

[bugs183]

I've tried all ways, rollering seems to use lots up and over saturate the floor, spraying keeps an even spread of primer.