Home > Companies > SMET Building Products Ltd > Sopro MGR 637 multi-purpose primer

Extra-low-emission, quick-drying, one-component reaction resin primer. Particularly suitable for calcium sulfate-based (anhydrite) screeds when laying large-format fully vitrified stoneware units and for stabilizing all types of absorbent and non-absorbent substrate.


  • For indoor and outdoor use.
  • Specifically for calcium-sulfate based screeds when laying large format fully vitrified stoneware units.
  • Suitable for floor heating systems.
  • Ready to receive covering: after 30–40 minutes.
  • Water and solvent-free.
  • GISCODE RU 1 – solvent-free to TRGS 610.

Standard product features


Approx. 175 g/m² per priming coat; 175 – 350 g/m² (1 – 2 coats); avoid ponding.


Suitable substrates:

Sopro MGR 637 is used in undiluted form, blinded with 0.4–0.8 mm Sopro QS 511 coarse silica sand, as a primer for mineral and moisture sensitive substrates, e.g. concrete, cement or magnesium oxychloride (magnesite) screeds. It is particularly suitable for calcium sulfate based screeds. Also for use on timber floorboards, particleboard, oriented strand board (OSB) and hardboard.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-35-64/318 Primers for floor coverings

Product specification

An important note about specifying



SMET Building Products Ltd


+44 (0)28 30266833

Product reference

Sopro MGR 637 multi-purpose primer

Manufacturer details

93A Belfast Road,
Co Down, BT34 1QH
Tel +44 (0)28 30266833
Fax +44 (0)28 30267619
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