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NBS Source


Suitable for use on interior and exterior walls and floors, heated screeds, overboarded wooden floors, low porosity tiles or substrates and tiling onto existing tiles.


A cement based, semi-flexible, high-strength single-part adhesive for fixing low porosity tiles or when limited movement or vibration is expected which exceeds the requirements of EN12004 for C2-S1 and can be primed with AD250 or PR360.


Not recommended for fixing:

  • In situations more than 3 m high (without mechanical fixing).
  • Rapid-set adhesive may be preferred at low temperatures.


  • Surfaces to be clean, dry, sound and free from dust, grease or any other contamination.
  • Substrate capable of supporting the weight of tiling.
  • Make good any unsound areas and remove flaky or peeling layers.


  • Ribbed, for use on wall tiling/ floor tiling.
  • Solid, for use on wall tiling in areas subject to wetting/ floor tiling.

Available in 20 kg bag.

General information

Specification data - Cementitious adhesives

Open time (minimum)

10 minutes.


Light grey.


Product Reference

weberset SPF




9 kg/m² (solid bed, 6 mm thick), 4.5 kg/m² (solid bed, 3 mm thick), 3.0 kg/m² (using a notched trowel with 6 x 6 mm, notches at 12 mm centres.

Pot life

1 hour.

Setting time

2 hours – light foot traffic, full load after 24 hours.

Temperature resistance

–10°C to 100°C and frost resistant when set.

Particle size

Up to approx. 0.5 mm.


4 L per 20 kg.

Thickness range

3–6 mm.

Environmental information

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

BIM objects

Platform Compatible Version




Third party certifications

  • BS EN 12004 : C2-S1

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