RadonTec | AlphaSeal Sealing slurry

Item number: 32-45x

189,00 €

including 19% VAT. , no shipping costs


There are variations of this item. Please select the variation you wish.


AlphaSeal radon-proof thick coating for a safe home

AlphaSeal radon-proof 2-K coating can be used for a variety of applications. The polymer-modified thick coating (FPD) can be used as an interior and exterior structural waterproofing membrane on horizontal and vertical surfaces, as well as for structural repair.

As a hybrid waterproofing system, AlphaSeal combines the advantages of a polymer-modified bitumen thick coating (PMBC) and a flexible mineral sealing slurry (MDS).

AlphaSeal complies with the DIN EN 14909 and DIN EN 13967 standards.

When installing the AlphaBlock 4+ radon foil, the AlphaSeal sealing slurry is used for radon-proof bonding of the foil to the corresponding parts of the Building.


Test reports and certifications

  • General building authority test certificate (abP) for MDS
  • MPA test report for FPD
  • MPA test report crack bridging
  • Test report: Tight against radon at 3 mm TDS
  • CE certification according to EN 14891 CM O1


Areas of application of AlphaSeal

  • Radon sealing: for radon-proof bonding of the AlphaBlock 4+ radon foil
  • Building waterproofing: interior and exterior
  • Building repair
  • Base waterproofing
  • Surface sealing: horizontal and vertical
  • under tiles, screed and rising building component
  • Bonding of insulation boards (after approx. 24h)
  • For substrate preparation as cove mortar or scratch coat, filled with quartz sand
  • As FPD: Crack bridging up to max. 1.0 mm (crack bridging class RÜ3-E according to DIN 18533-1 or crack class R3-B according to DIN 18535-1).
  • As MDS: Crack bridging up to max. 0.2 mm (crack bridging class R1-E according to DIN 18533-1 , or crack bridging class R1-B according to DIN 18535-1)


Technical data of AlphaSeal

  • Color: dark gray
  • Solid: approx. 90 wt.%
  • Density (+20 °C): approx. 1.10 g/cm³
  • Processing temperature: + 2°C to + 30°C
  • Processing time: approx. 45 minutes


Properties of AlphaSeal

  • Radon-proof
  • Rapidly rainproof, after approx. 2h
  • Water pressure resistant, within 24h (up to 10m water column)
  • Tough elastic
  • Crack-bridging
  • Can be plastered over
  • Can be painted over
  • Bitumen-free
  • Mineral
  • UV-resistant
  • Frost resistant
  • Can be refilled after only 16 hrs.
  • Fast setting, even at temperatures of +2°C
  • Creamy and homogeneous application



A fresh layer of 1.02 mm results in a dry layer of approx. 1 mm. The consumption thus corresponds to 1.07 kg/m².

When bonding AlphaBlock 4+ Radon Film, a fresh layer of 4 mm (3 mm dry layer) and a consumption of approx. kg/m² must be expected.

The additional consumption of approx. 1 - 1.5 kg/m² for scratch as well as filler fillings and variations due to processing must be calculated additionally.


Substrates for AlphaSeal

  • clean
  • free of grease and oil
  • free of loose constituents
  • on dry or slightly damp substrates
  • on old bituminous substrates
  • on mineral waterproofing


Shelf life

The original sealed container has a shelf life of at least 12 months. Storage must be dry, cool but frost-free.


RadonTec | AlphaSeal Instructions for use DE

RadonTec | AlphaSeal Instructions for use EN

RadonTec | AlphaSeal Prüfbericht DE

RadonTec | AlphaSeal Datasheet DE

RadonTec | AlphaSeal Datasheet EN

RadonTec | AlphaSeal Safety data sheet Komp. A DE

RadonTec | AlphaSeal Safety data sheet Komp. B DE

RadonTec | AlphaSeal Flyer DE

RadonTec | AlphaSeal Flyer EN


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