ProJoint Porcelain Primer

£39.00 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 ☎️ 0845 862 1099

6 in stock


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 ☎️ 0845 862 1099

Additional information

Weight 20 kg


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