Another problem is called efflorescence.
Concrete primer before painting.
A quality masonry primer will allow you to safely paint over a wider range of ph levels without risk of adhesion loss.
Check the weather forecast to ensure you have 2 3 dry days in a row before painting outdoor concrete.
Which are unsightly white crystalline deposits that can form on any masonry surface.
Primer is essentially sticky flat paint that is designed to adhere well and to provide a consistent base for topcoats of paint.
Updated january 13 2020 a coat of primer is recommended for almost all painting projects whether it s new drywall old wood bare metal previously painted brick or any other surface.
Simple 5 step guide to concrete painting.
Purchase the right paint for the right concrete.
Some masonry surfaces can have a high ph level which will cause adhesion problems if you apply paint directly to the surface.
Select a primer that s compatible with both concrete and the epoxy paint that you ll use as a finish coat.
Priming before you paint concrete floors helps ensure that your new look will stick.
There are several reasons why it is a good idea to apply a masonry primer before paint.
Apply 1 layer of concrete paint primer with a paint roller.
Most primers will dry in a few hours but home improvement professionals suggest waiting a full eight hours after priming before applying paint just to be sure.