Product #: AXP4
Ardex P4 Primer is a ready mixed, rapid drying, solvent free primer. It can be used on internal and external walls, ceilings and floors. Ardex P4 can also be used prior to the installation of tile adhesives and floor-leveling compounds as well as facilitating tiling onto existing tile. The consistency of Ardex P4 has been optimized so that dripping and splashes are virtually eliminated
Key Features
- Coverage: 8kg of undiluted Ardex P4 Primer is usually sufficient for priming at least 40m2 per unit on most typical substrates
Note. coverage depends on the texture and absorbency of the substrate. Porous surfaces will require more material - White, single component, solvent free system
- Ready mixed for convenience and ease of use
- Rapid drying – further work can commence after 1 hour
- Moisture resistant – for internal and external use
- Suitable for use on a wide range of absorbent and non-absorbent substrates including; concrete, cement and lime renders, sand/cement screeds, ceramic tiles and slabs, terrazzo, dispersion based paints, traces of non-water soluble flooring adhesives, dry screeds and leveling and smoothing compounds
- Suitable for use on walls, floors and ceilings
- Suitable for use with Ardex tile adhesives and floor leveling compounds
- Suitable for use with underfloor heating systems
- Consistency optimized to virtually eliminate messy drips and splashes
Instructions for use
Surface Preparation
- Allow all new substrates to dry fully i.e. new concrete should be allowed to dry for a minimum of 6 weeks and new cement screeds for a minimum of 3 weeks
- Check existing substrates are fully dry i.e. with flooring materials the screed should have an RH reading of no greater than 75% and, where direct to ground, protected by an effective damp proof membrane< /li>
- The substrate must be firm and free from dust, water soluble materials, excess adhesive residues, polish, wax, grease and other barriers to adhesion
- Ensure the ambient temperature and temperature of the surface being primed is above 5°C
Mixing & Application
Ardex P4 is a ready mixed and ready to use primer (however to facilitate application to absorbent substrates it can be diluted with up to 1 litre of water per 8kg)
- Apply a thin, even coat with a short pile roller or paint brush
Note. apply the primer evenly and allow sufficient coverage on the substrate - Allow to dry to a thin white film approx. 60 minutes at 20°C
Note. at lower temperatures and on dense substrates the drying time will be extended and at higher temperatures on absorbent substrates the drying time will be shortened. Do NOT use on surfaces where the surface temperature is less than 5°C
Reseal opened packaging after use to avoid evaporation and contamination
Cleaning
- Tools can be cleaned with water if the Ardex P4 is still wet and has not formed a dry film
Recommendations
Ardex P4 Primer is NOT recommended for use on metal and mastic asphalt, excess residues, polyurethane and epoxy coatings; for this use Ardex P82 Water Dispersed Epoxy Primer
Ardex P4 Primer is NOT recommended for use in submerged locations such as swimming pools




