PROMATECT®-250 comprises autoclaved calcium silicate spheres bound in a mineral matrix. This PROMAXON® technology - a synthetic hydrated calcium silicate in spherical form - provides excellent performance in most fire resistant applications.

PROMATECT®-250 is off-white in colour. The front face is smooth and is suitable for any forms of architectural/finishing treatment while the reverse face is sanded. 

PROMATECT®-250 is resistant to moist conditions and will not physically deteriorate in humid environment. Whilst its performance characteristics are not degraded by moisture or aging.

PROMATECT®-250 is not designed for application in areas subject to continual damp or high temperatures. The product is recommended for interior applications only.


  • 30 - 120 minutes fire resistance
  • Cost effective
  • Easy to work
  • Good finish