ARDEX P4 - Indoor-outdoor multi-substrate primer

Single-Component primer and bonding bridge. Solvent free. Ideal as a first in supports both porous and non-porous. Interior Exterior.

Packaging format
Tax excluded


Field of application:

Interior and exterior walls, ceilings and floors.

Primer and bonding agent for absorbent and non-absorbent substrates, e.g. for PVC coatings:

PVC coatings have to be well bonded and free of waxes or other materials that could

can create a barrier to adhesion.

  • - Concrete. 
  • - Cement or lime plasters. Consumption: approx. 150 - 500 g/m2 (depending on substrate).
  • - Mortar or calcium sulphate screeds. Drying at 20°C: approx. 60 minutes. 
  • - Ceramic and stoneware. Terrazzo and natural stone. 
  • - Dispersion paints. none 
  • - Adhesives for light, old, non-water-soluble screeds. Classification according to classification of hazardous substances
  • - Packaging: PVC coatings. 
  • - Storage: 
  • - Cementitious self-levelling compounds.  


Solvent-free synthetic resin dispersion, solvent-free, with additives and special fillers, non-dripping and non-spattering.

White colour. Its application leaves a rough surface ideal for plastering, rendering and self-levelling, even on smooth or low absorbent substrates.

Substrate preparation:

The substrate must be dry, firm and free of dust, grease or any product that may pose a barrier to adhesion. It must also be sufficiently resistant to withstand the subsequent uses to be given to it.


ARDEX P4 is ready to use and can be applied by short nap roller, brush, or spray.

Apply evenly over the entire surface. Allow to dry to a thin white film before commencing subsequent work. Drying time will be approximately 60 minutes at 20oC.

Lower temperatures and very dense substrates may lengthen drying times, higher temperatures and very absorbent substrates may shorten drying times.

On absorbent substrates ARDEX P4 can be applied diluted by 15% with water.

Please close opened cans tightly and use the product within the following days.

The substrate temperature should be above 5°C and below 30°C.


As a primer on wood substrates, paints, asphalt, magnesite screeds and existing polyurethane, epoxy or bitumen based adhesives the use of ARDEX P82 Bonding Bridge is recommended.

Self-levelling and water-soluble adhesives (e.g. sulphite-based adhesives) must be removed.

Technical data

(according to Ardex quality standards):

Consumption: approx. 150 - 500 g/m2 (depending on substrate).

Drying time at 20°C: approx. 60 min.

Classification according to hazardous substance classification [GefStoffV]: GISCODE: D1

Packaging: 8 kg net buckets

Storage: . Approx. 12 months in cool place in closed original packaging.

Product Details

Bonding Primers and Bridges
Indoor and outdoor
Single component
Resina sintética


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10 % discount on all products

using the coupon: CONS23


Due to the Constitution Day holiday, orders placed between 05/12/2023

and 10/12/2023 will be processed from Monday 11 December.