Perfect for use on both absorbent and non-absorbent backgrounds, as well as internally and externally, Ardex P4 is a ready mixed primer that produces a textured surface that's ideal for the adhesion of cement based tile adhesives and tile-on-tile application. Convenient resealable tub Ideal for tile-on-tile applications due to textured surface Short 30 minute drying time Clearly identify primed areas through white pigment No-mess consistency, free from drips or splashes Easy application Solvent free Ideal for wall and floor applications Perfect for internal and external use Works well with with underfloor heating Unit Size Available: 1kg, 5kg, 25kg Coverage: Refer to product datasheet