Floor primer paints should always be used in order to acheive the best results because it lays a foundation for which the paint itself can better adhere to. A few of the benefits to using primers are that:
It ensures subsequent coatings do not soak into the concrete
Its thin nature means that the next coating bonds better to the floor
Provides a moisture barrier
Eliminates the common problem of bubbles and pinholes forming
They work by getting deep into the pores of the floor – ensuring your project comes a long lasting, flawless look.