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Huge Discounts On Bulk Orders – Call 0845 862 1099 For A Bespoke Quote.

Fast Delivery UK Mainland

Free Delivery on Full Pallets & Selected Lines

Collection by Appointment

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Next Day Delivery Available

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UltraScape Pro-Prime Slurry Primer 20Kg

£19.99 Ex. VAT - £23.99 Inc. VAT

UltraScape Pro-Prime slurry paving primer stops efflorescence & provides a secure bond between paving slabs & bedding mortar, particularly recommended when laying porcelain due to its non-porous nature. Pro-Prime Slurry has a unique blend which enables it to adhere to porcelain and create a stronger adhesion with the mortar bed. One bag of Pro-Prime covers 15m2 per 20kg bag at 1-2mm thickness. UltraScape Pro-Prime adheres to BS 7533 and is highly recommended for use with Flowpoint Paving Grout & Eco-Bed.

We aim to offer the most competitive price and the best service online, found a cheaper price? Call us on ☎️ 0845 862 1099.  


In stock

Get it from Tue 24th. May - Thu 26th. May Estimated delivery date, click here for info
Next Day Delivery available at checkout

Bulk Buy Savings!

Buy 28 and pay just £17.99 each!
Buy 56 and pay just £16.99 each!
Prices exclude VAT.

Pallet Deals also available!

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 0845 862 1099). Need further info, click here.

Weight Price Volume
0-25KG £8.001 bag / tub
25.01-50KG £16.00 2 x bags / tub
50.01-75KG £24.00 3 x bags / tub
75.01-100KG£32.004-5 bags /tubs
100.01-249 KG £38.00 5-9 bags / tubs
249.01-750KG £40.0010 bags plus
750.01KG + £30.00 30 bags plus
Full Pallets FOC* £0.0052 tubs / 56 bags
Premium Next Day Service+ £10 Click here for prices
Scotland Delivery Service Click here for prices
Local Delivery & Click & Collect: ☎️ 0845 862 1099

*Small additional charges may apply to certain parts of Scotland or areas with HGV Restrictions. Next Day delivery + £10 (*exc. apply)

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 0845 862 1099.

how much do i need?


Slab Width

Slab Length

Joint Width

Joint Depth


UltraScape Pro-Prime Slurry Paving Primer

UltraScape Pro-Prime slurry primer is a paving primer that is used to create an exceptionally strong bond between your paving slabs and the bedding mortar, it can also dramatically reduce the risk of efflorescence or staining appearing on the surface of your paving.

Traditionally, paving and cobbles would have been laid directly onto the bedding mortar, risking loose and wobbly slabs over time, using a priming slurry such as UltraScape Pro-Prime, helps to eliminate this as the primer creates a really strong bond between the paving slabs & bedding mortar. Pro-Prime Slurry is also highly recommended when installing porcelain because of the non-porous nature of porcelain, without the use of a primer it will not bond to the mortar bed.

  • Highly recommended when laying porcelain paving
  • Provides a secure bond between slabs, cobbles & mortar bed
  • Quick and easy to apply
  • Colour: Grey
  • Coverage: 15m2 per 20kg bag at 1-2mm thickness
  • Yield: 16.9 litres
  • Supplied in a 20kg reinforced paper bag.
  • User-friendly – requires only the addition of water on-site
  • Water Required: 7 litres per 20kg
  • BS 7533 compliant
  • Part of the UltraScape mortar paving system
  • NBS Plus registered for ease of specification
  • Workability: 1 hour @ 20ºC
  • Storage: Store in a cool, dry and frost free area at temperatures between 5°C and 30°C
  • Shelf Life: 8 months from the date of manufacture printed on the bag unopened in the above conditions. High temperatures and high humidity will reduce shelf life.

Pallet deals also available £15.99 +vat per bag (56 bags per pallet) 

Use with the UltraScape BS 7533 Mortar Paving System, a range of high performance materials that meet and exceed the strict demands of BS 7533. Including a rapid strength fine bedding concrete – EcoBed and flowable jointing grout Flowpoint

If you have any questions please feel free to give us a call on ☎️ 0845 862 1099. Alternatively check out our primer FAQs or read our article on What is a slurry primer?

Technical info

UltraScape Pro-Prime is supplied pre-blended in 20kg bags. You simply add water on-site, the product creates a liquid slurry paste, which can be applied to the underside of all paving elements with a brush or roller at a thickness of 1mm to 2mm immediately prior to their placement on UltraScape Pro-bed HS/Eco-Bed. Pro-Prime helps to provide bond strength and prevent staining and efflorescence.

How do I prepare to use Pro-Prime Slurry Primer?

Remove all debris, dirt and ponded water from the supporting structure or roadbase. It is important that the roadbase as well as the paving slabs are cleaned by brushing or washing with water to remove dust, loose material or packaging prior to the application of UltraScape Pro-Prime slurry paving primer.

How do I mix Pro-Prime Slurry Primer?

Place 7 litres of clean water in a suitable bucket or container. Add the UltraScape Pro-Prime powder slowly and mix for 3 to 5 minutes to create a smooth lump-free slurry. The primer should be used on the supporting layer or roadbase immediately prior to the application of the laying course UltraScape Eco-Bed / Pro-Bed HS. Then prime the underside of paving elements with Pro-Prime using a brush or roller at a thickness of 1mm-2mm immediately before their placement upon the bedding mortar.

How do I apply Pro-Prime Slurry Primer?

All surfaces should be pre-soaked with clean water immediately prior to the application of UltraScape Pro-Prime slurry primer. The supporting layer/roadbase should be coated with the primer at a thickness of 1mm-2mm immediately before the application of UltraScape Eco-Bed or Pro-Bed HS. The slurry should be fresh and wet when the fine bedding concrete is laid.


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