Cornice Cement

Gyprock Cornice Cement is used for fixing Gyprock cornice at wall and ceiling junctions where the substrate is plasterboard or fibre cement. It is also used for finishing cornice joints and mitres.

Typical Applications

Cornice Cement is typically used for substrates in residential construction. A shorter setting time is sufficient for small projects whereas Cornice Cement 90 is ideal for larger jobs, or where decorative cornice is being installed. This extended working time allows the user to enjoy a longer period between mixes, and also more time to get the finish right for any detailed areas.

Category: CSR, Adhesives & Sealants
Store availability: Cabramatta, Katoomba
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Cornice Cement is a setting type compound rather than a drying type that provides superior adhesion with good initial grab and high bond strength.

Three different options are available in the Cornice Cement range, each with a defined setting time for varying job sizes:

  • Cornice Cement 45 has a 45 minute working life. This product has an unstabilised setting time that can be accelerated readily by adding a small amount of set plaster such as crushed Gyprock core.
  • Cornice Cement 60 has a 60 minute working life.
  • Cornice Cement 90 has a 90 minute working life.

Product Options

Cornice Cement is available in the following sizes:

Cornice Cement 45 10kg, 20kg
Cornice Cement 60 10kg, 20kg
Cornice Cement 90 20kg

Stockholdings may vary. For product availability and to place an order, contact your nearest supplier.

Physical and chemical properties

Specific gravity (H2O=1) 2.3-2.4
VOC content (as specified by GBCA) Cornice Cement 45 and 60 – <10 grams per Litre as VOC content per material
Cornice Cement 90 – 15 grams per Litre as VOC content per material

Product Manufacture

Gyprock Cornice Cement is manufactured by CSR Gyprock in Australia to stringent product specifications.

Product Handling

Transportation and manual handling: Refer to the Gypsum Board Manufacturers of Australia (GBMA) website for recommended OH&S practices.

Storage: Store bags of compound in a dry environment, protected from the weather and out of direct sunlight. Tear bag open from top corner to dispense compound. Unused product which has been mixed with water should be discarded. Unused product in powder format should be stored in original bag: roll the top of the bag to loosely seal, and store in an airtight container.

Health and Safety

Safety Data Sheets are important documents in the construction industry and assist in the continuing focus on occupational health and safety on and off sites.

Installing to Standards

AS/NZS2589: Gypsum linings – Application and Finishing outlines the procedures for jointing and finishing of Gyprock plasterboard in conjunction with additional details contained in Gyprock Technical Literature.


Gyprock makes available resources that provide comprehensive selection, design, installation and maintenance guidance.

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