NBS Source
Pro-Prime: Slurry Primer


  • UltraScape Pro-Prime is a polymer modified cementitious slurry primer specifically formulated to provide exceptional bond between all types of stone surfaces and Porcelain tiles and UltraScape Pro-Bed HS fine bedding concrete.
  • The use of Ultrascape Pro-Prime in conjunction with UltraScape Pro-Bed HS /eco-bed ensures full and even contact will be made with aggregate particles as well as promoting adhesion to greater than 2 N/mm2 as per the requirements of BS 7533.
  • The product is suitable for application in town centre pedestrian schemes, pathways and carriageways.
  • UltraScape Pro-Prime can be used with all types of natural stone, concrete flags and clay paviours. 


UltraScape Pro-Prime is supplied pre-blended in 20 kg bags. With the simple addition of water on-site, the product creates a liquid slurry paste, which can be applied to the underside of all paving elements at a thickness of 1 mm to 2 mm immediately prior to their placement on UltraScape Pro-Bed HS/eco-bed.

Features and benefits:

  • Provides exceptional bond between bedding concretes and all types of paving elements.
  • User-friendly - requires only the addition of water on-site.
  • BS 7533 compliant.
  • Quick and easy application.
  • Part of the UltraScape streetscape system, which guarantees compatibility and reduces split liability.

General information





*As with all raw materials, colour variation may occur. Please note that this does not affect the consistency or characteristics of the enclosed product



UltraScape Pro-Prime is a polymer modified cementitious slurry primer.


Pr_20_31_53_62 Paving unit priming slurry mortarsPrimary


Q25/435 Primer for underside of flags and slabs

Specification data - Paving unit priming slurry mortars Enhanced data


In accordance with BS 7533.

Delivery condition


20 kg bag.

Adhesion bond strength

2.20 N/mm².


1 hour at 20°C.


7 L per 20 kg.


15 m².

Per 20 kg.

Typical yield

16.9 L.

Approximately per 20 kg bag.