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Nuclasit 2.4

Nuclasit 2.4

Fire & radiation protection mortar

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Nuclasit 2.4

Nuclasit 2.4

Fire & radiation protection mortar

One-component, hydraulically curing and ageing-resistant, suitable for pumping, pressing and for manual installation, free of fibres, phenol and halogen softeners

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Field of Application

  • Use in nuclear installations, reprocessing plants and machines with radiation protection requirements according to the German Radiation Protection Act (StrlSchV) and X-ray Act (RöV)
  • Used as closure material for cable, pipe and mixed penetration seals
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  • DoP No. 01165000-NUCLASIT-2.4
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Field of Application

Radiation protection mortar for filling openings of cable and pipe penetrations in floors and walls, also suitable as filling material for door frames. To be used in nuclear installations, reprocessing plants and plants with radiation protection requirements in accordance with radiation protection regulation (StrlSchV) and Roentgen regulation (RöV).

Applicability certificate

Tested and approved according to national and international standards as e.g.:
DIN V 18580 and DIN EN 998-2, other standards on request

Product Features

One-component, hydraulically hardening; applied by spraying, pressing and manual installation; free from fibres, phenols and halogens, aging resistant.


No radiation-induced damages of serious kind determined according to irradiation table (stage 3 and stage 4) during the irradiation with gamma-rays.

Attenuation measurement

Attenuation measurements accomplished at insulating boards made of mineral mortar NULASIT 2.4 (plates 55 x 55 x 5 cm). The shield effect of the insulating boards is comparable with Barite concrete with a density of 3.5 g/cm³.

Pressure resistance examination

The determined pressure resistances according to DIN 18550 of unirradiated and irradiated radiation protection mortar NUCALSIT 2.4 is comparable.


  • Application temperature > +5 °C
  • Processing time app. 3 – 4 hours
  • Ultimate strength and setting-off reached after app. 28 days
  • Surfaces must be firm and free from adhesion-reducing substances and dust.
    Absorbent surfaces are to be pre-wetted with water.
  • The consistency of the mortar has to be adjusted in such a way that all openings are cavity-free filled.

Technical Data

Color reddish-grey
Gross density (wet mortar) 2,800 – 3,100 kg/m³
Gross density (dry mortar) 2.50 – 2.9 kg/dm³
Pressure resistance 18 – 22 N/mm²
Bond strength
0.5 – 0.8 N/mm²
Compression strength within the mortar joint
3 – 4 N/mm²
~ 3l water + 30kg dry mortar
≈ 11l ready-to-use wet mortar
≈ 11l volumes after curing time

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Nuclasit 2.4

Nuclasit 2.4

Fire & radiation protection mortar