MastaCove45 Cornice Cement Siniat

MastaCove45 is a plaster based cornice cement used to attach cornice and decorative features to walls and ceilings. It has a consistent working time of 30 minutes with a 45 minute setting time, to suit all cornice applications, from paper faced and fibrous cornice to polishing mitres for smooth painting surfaces.

MastaCove45 mixes easily to a creamy gauge, it has good body for easy placement when buttering cornice, great initial grab and is easy to reposition cornice. Partially set product can be reworked and used again to deliver the high finish required for polishing mitres. MastaCove45 is easy to straight stop and clean and provides an even and gradual 45 minute set which can be accelerated by extended mixing, either by hand on the hawk or by drill mix. Flexible product setting meets the different needs of every project and allows plenty of time for cutting and polishing mitres.


  • Chemical setting
  • 30 – 45 minute working time
  • Mixes easily to a creamy gauge
  • Sets evenly
  • Excellent workback
  • Available in a 20kg bag

Additional Information



Unit Size

20kg Bag


Powder / Dry Compounds (Siniat) – Safety Data Sheet
Plasterboard (Siniat) Installation Instructions
Siniat System (Siniat) Warranty


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