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ProJoint Porcelain Primer

£34.99 Ex. VAT - £41.99 Inc. VAT

A super high performance slurry primer for porcelain paving!

ProJoint Porcelain Primer is a high performance priming slurry for porcelain paving, and ceramic tiles. It comes as a ready mixed powder that just needs the addition of water, you simply apply one coat with a brush or roller to the underside of paving. ProJoint Porcelain Primer is ideal for both internal and external applications and can be applied in low temperatures.  Comes supplied in a bucket, with 2 x 10kg bags contained within the mixing tub.

We also recommend using ProJoint Porcelain Paving Grout along with your primer, for laying porcelain paving.

We aim to provide the most competitive prices online if you find ProJoint Porcelain Paving Grout anywhere cheaper please do give us a call on ☎️ 0330 122 1025

In stock

Get Orders By Fri 26th. Apr - Tue 30th. Apr Estimated delivery date, click here for info
Next Day Delivery available at checkout
Please see our FAQ’s for more information.

Delivery & Returns Info

Delivery is calculated on size & weight of order, charges displayed when added to basket. Small orders via courier, larger orders via Pallet Network (Click & Collect available call 0330 122 1025 or 01827 794 350). Need further info, click here.

Weight Price Volume
0-13KG£9.00+VAT1 Small Bag / Tub
13.01-25KG £10.00+VAT1 Large Bag / Tub
25.01-50KG £19.00+VAT 2 x Bags / Tubs
50.01-75KG£28.00+VAT 3 x Bags / Tubs
75.01-100KG£36.00+VAT4-5 Bags /Tubs
100.01-249 KG£42.50+VAT 5-9 Bags / Tubs
249.01-750KG£47.50+VAT10 Bags Plus
750.01KG + £50.00+VAT 30 Bags Plus
Full Pallets FOC* £0.0052 Tubs / 56 Bags
Premium Next Day Service+avg. £15 Click here for prices
Scotland Delivery Service Click here for prices
Local Delivery & Click & Collect: ☎️ 0330 122 1025

*Small additional charges may apply to certain parts of Scotland or areas with HGV Restrictions. Next Day delivery + £15 (*exc. apply – Full Pallets £80 on a Next Day Service)

Returns, cancel up to 14 days from date of delivery. Product to be returned in the same condition & packaging. No returns for cementitious & perishable products. You are responsible for returning goods to The Paving Experts. Need further info, click here.

For any advice; technical, product, stock or quantity needed, call our team on 0330 122 1025.

how much do i need?


Slab Width

Slab Length

Joint Width

Joint Depth


ProJoint Porcelain Primer

ProJoint Porcelain Primer is a flexible, waterproofing slurry primer with excellent workability and adhesion properties. ProJoint Porcelain Primer is applied in one coat for fast application, and provides ultimate adhesion for porcelain, concrete, ceramic tiles, paving slabs or setts. Ideal for both internal and external environments, the primer can be applied with either a brush or roller.

The primer comes as a powder ready to be simply mixed with water, it is supplied in two 10kg bags within a lidded tub, the tub is also ideal for mixing the primer.

  • One coat application to the underside of paving
  • Excellent workability and adhesion properties
  • Suitable for brush or roller application
  • Can be applied in low temperatures
  • Suitable for internal and external use
  • 2 x 10kg bags contained within the mixing tub

We also recommend using ProJoint Porcelain Paving Grout along with your primer, for laying porcelain paving.


ProJoint Porcelain Primer has been manufactured to be applied to the underside of porcelain paving and other low absorption substrates to promote adhesion. The underside of the paving should be clean, dry and free of any material which may impair adhesion – do not apply to shiny surfaces. Do not use in wet weather and do not use if frost is forecast within 24 hours of application. Suitable for use in temperatures between 3°C and 25°C.

ProJoint Porcelain Primer should be mixed with 2.8 litres of cold clean water per 10kg bag. Remove the bag from the bucket and add the water to the mixing container. Add the powder slowly and mix using a plasterers’ whisk, mix for 2 minutes, leave standing for 2 minutes then re-mix – this process allows the polymer additives to dissolve and activate. You should end up with a batter like consistency.


To apply, use a masonry brush or roller and brush a thorough and even coat of the primer to the underside of the paving. The working time for the mixed slurry is approximately 60 minutes at 20°C. Depending on temperature and moisture, the primer should cure sufficiently for the paving to be laid in 10 to 15 minutes following application.

All tools should be washed out with water immediately after use. Waste material shouldn’t be emptied into drainage systems.


Approximate coverage per 20kg tub is 21.5m2 depending on the application method and paving porosity. If you’d like a more accurate calculation please do get in touch and we’ll be more than happy to help.


When stored unopened in a dry place above 5°C, shelf life is 12 months from date of manufacture. For health and safety information – a full datasheet is available on request.

For any further information please don’t hesitate to get in touch on ☎️ 0330 122 1025


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