Skip to content
Confidence builder icon

Next day delivery

Confidence builder icon

Largest building products ranges in the uk

Confidence builder icon

Trusted technical advice

Confidence builder icon

Need help? Browse our FAQ

Ardex P51 Primer - 5KG

Ardex P51 Primer - 5KG

(no customer review)Add a review
£46.44(Inc VAT)
£38.70(Ex VAT)
SKU: 8423Category: Flooring Primer Brand: Ardex
The Ardex P51 primer is a concentrated, blue, synthetic, water-based, solvent-free multi-purpose primer. This has a wide range of applications and, af... Read full description

This Variant Includes

This item is in these bundles

The Ardex P51 primer is a concentrated, blue, synthetic, water-based, solvent-free multi-purpose primer. This has a wide range of applications and, after drying, helps to inhibit the penetration of water from subsequently applied materials. Ardex P 51 is a multi-purpose primer ideal for priming porous surfaces prior to the application of ARDEX Levelling and Smoothing Compounds.

Ardex P51 Primer features:

The Ardex P51 Primer is an industry-standard primer and bonding agent that is high strength and is easily identifiable by the blue hue and also has many features such as:
  • Easy to use, dilute as appropriate for the application
  • Cost effective, up to 160m2/5kg unit
  • Multipurpose - Suitable for a wide range of applications
  • For floors, walls and ceilings, including dense and porous surfaces
  • Ideal for sealing and priming gypsum-based plasters and screeds
  • Solvent-free
  • Blue pigment of P51 allows for clear identification of primed areas
  • Convenient re-sealable tub

The Ardex P51 primer is perfect water based primer for many applications due to it’s multi purpose nature and solvent free base and is perfect for priming a wide range of surfaces.

Ardex P51 Primer Uses

The Ardex P51 Primer is a multi-purpose primer and bonding agent that is perfect for priming porous surfaces before work. There are also  many other use cases for this product here:
  • Pore sealant on absorbent subfloors
  • Seal the surfaces of cement or gypsum plaster-based materials.
  • Used as a bonding agent to improve adhesion.
  • Priming rigidly supported and conditioned plywood before fixing ceramic tiling.
  • Can be a temporary protective coating over cement-based smoothing compounds and repair mortars.

How To Apply Ardex P51 Primer

To apply Ardex P51 Primer please follow the instructions provided, we have also included instructions here:
  • Shake well before use and dilute when necessary (To dilute: put the Ardex P51 Primer in a clean container and mix with water as specified in the Ardex P51 technical datasheet, this also contains information of the Ardex P51 mixing ratio, coverage and drying time.)
  • Ensure optimal temperatures are met (ambient and surface temperatures are above 5 Degrees Celcius)
  • Apply the primer/ bonding agent evenly over a clean surface and leave to dry.
  • ARDEX P 51 can be used as a temporary protective coating over cement-based compounds and repair mortars where these have foot traffic before the flooring is applied and as a temporary dust-proofing treatment on screeds.

    *If using Ardex P51 Primer on flooring grade plywood it is recommended that the dilution rate is 1 part Ardex P51 Primer with 1 Part water. 
Ardex P51 Primer Size - 5KG

Download the Ardex P51 Primer Technical Datasheet PDF

To be used with Arditex NA

To be used with Ardex K40 HB

Estimated delivery 1-2 working days to UK mainland



Delivery and Return

Charges start from £6.90 inc vat on small, lightweight orders and £22.50 inc vat on heavier or difficult to transport items.

All small item orders with a value of £100.00 inc vat will be carriage paid.

All large item orders with a value of £200.00 inc vat will be carriage paid.

*small or large classification of items are determined by weight and dimension of product*

Please note that your order may need to be split into separate packages if over 30KG.

All of the above is based on UK Mainland deliveries, further charges may be incurred if the delivery address is outside of this.

We are also currently unable to deliver outside of the UK on our regular carrier so if you require delivery outside the UK please call or email the details to the office as we reserve the right to refuse service or refund orders based on this.

Guarantee next day delivery.

Some of our products have a note that states – if ordered before 1pm and being delivered to UK mainland on a next day basis.

Please note that given the current circumstances alot of carrier companies are struggling to keep up with demand and although we do book these deliveries as next day services, the carriers cannot always fulfil these and an extra day may be required.

A high percentage of our advertised goods are stock items but be aware that if you are taking very large quantities of stock that we may not be able to fill your order fully on first delivery. Please call the office to check to not be disappointed.

We are also an active trade counter and part of a larger network of companies so stock can be taken at any time but we will always aim to deliver your goods as soon as possible.

Also if ordered along side goods that we cannot guarantee next day delivery on, these will be delivered based on the schedule of the other item.

Signature required on delivery.

The carrier we currently use requires a signature for all deliveries as a proof of delivery. If you cannot guarantee someone will be home to receive this please leave delivery instructions for a safe place or neighbour to leave your goods with. Due to covid and new contactless deliveries, our carriers will not require a signature but will take down the recipients name as POD.

If no one is available to take the delivery, the courier will leave details at the address to rearrange delivery or may leave with a neighbour. Note we may need to make an additional handling charge for the return and re-delivery if a package is unable to be delivered multiple times due to no one being home to receive this. Due to covid our carriers are restricting the number of re-delivery attempts.

After three attempted deliveries our carrier will return the goods to ourselves and in this worst case situation, we may cancel the order and refund your money, excluding any additional charge for the return and re-deliveries.

Materials delivered from our own stock.

Normally 1 – 2 days (this can sometimes be longer if we are waiting for manufacturers’ stock to arrive into ours).

If the order is placed before 1:00pm and all of the items are in stock, then we will endeavour to dispatch your order same day for delivery the following day.

This still applies for deliveries out of our local area but please note that we use independent carriers so be aware that there may be external factors which we cannot control (e.g Far out postcodes or local traffic situations)

Materials delivered direct from the manufacturer.

There may be some occasions when it is more efficient or cost effective to have the materials shipped direct from our suppliers to the customer.

We will place the order immediately upon receipt of your order but this can sometimes take a few working days depending on the manufacturers production schedule or carrier used.

We will always endeavour to get the goods to the customer at the earliest possible date but if these are urgently required, please speak to us to check.

Please note that many manufacturers will offer a next day delivery service at an increased delivery cost and also a cut of time for this order to be placed (usually around 11am / 12pm)

Please call us on 08454 530 017 between 8am and 5pm Monday – Friday or email us on [email protected] for any delivery queries, or urgent requirements.

Please read our full terms and conditions with regard to full details on deliveries.

Ardex P51 Primer is a concentrated water-based primer and bonding agent for floors walls and ceilings, including dense and porous surfaces.

It improves the performance of flooring and levelling materials by improving adhesion as a bonding agent and retarding the wetting of the substrate by the applied materials.

Yes, it is vital that the substrates are prepared before using the Ardex P51 Primer. Substrates must be dry, protected by a functioning DPM, firm and free from dust, water-soluble materials, excess adhesive residues and other barriers to adhesion. Surface contamination such as residues of polish, wax, grease, curing agents etc. should be removed using Ardex DGR degreaser prior to suitable mechanised preparation

Only applied in a thin film, and as it is water based, it usually only requires 30 minutes minimum drying time (temperature dependant, colder temps = longer drying time).

Yes, the high bonding strength helps to inhibit the water penetration making for a longer lasting effect for any subsequently applied materials

ARDEX P 51 must be stored in unopened packaging, clear of the ground; in cool, dry conditions and protected from excessive draught. If stored correctly, the shelf life of this product is 12 months from the date shown on the packaging.