PROMASPRAY® P300 is a spray or trowel applied, single package factory controlled premix, based on vermiculite and gypsum.

PROMASPRAY® P300 is a lightweight coating that provides very efficient fire resistance with minimal thickness to return air plenums and air handling ductwork.

Building types that benefit from the use of PROMASPRAY® P300 include a wide range of educational, leisure and entertainment centres, and commercial projects.

Further Information


  • Fire Protection of steel ductwork
  • Fire Protection of Fan Enclosures


  • Fire Protection to steel ducts
  • Direct spray application
  • Economical - high yield – low density
  • Low material cost, efficient thicknesses
  • Monolithic coating
  • Most widely specified
  • Up to FRL 180/180/180

Reaction to fire: A1, non-combustible
Approx. Alkalinity (pH): 8.5pH
Initial Set: 10-15h
Approx. Thermal Conductivity @ 20 °C (W/m°K): 0.078W/m K
Application Temperature Min (°C): 5°C
Application Temperature Max (°C): 35°C
Shelf Life (months): 12months
Storage Temperature Min (°C): 5°C
Storage Temperature Max (°C): 45°C
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