Gyprock Jointmaster is a pre-mixed heavyweight topping compound developed to provide the perfect finish coat in a three coat plasterboard jointing system.

Typical Applications

Gyprock Jointmaster is typically used as a top coat in a three coat jointing system in residential and commercial walls and ceilings. While it can be hand applied, it flows smoothly through a finishing box.

Category: Topping Compounds
Store availability: Cabramatta, Katoomba
Online Enquiry

Jointmaster is a heavyweight topping compound used as the final coat in a three coat jointing system. It is formulated to provide a smooth even finish with machine sanding, and excellent paintability. This low-VOC compound is available in a convenient premixed form for easy application and is ready for sanding and painting approximately 24 hours later.

Product Options

Gyprock Jointmaster is available in the following pack size:

Pack 20kg Pail (12L approx.)
Coverage 10kg/100m2

Shelf life is 1 year from manufacture

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

Physical & Chemical Properties

Specific gravity (H20=1) 1.6 – 2.0
VOC content (as specified by GBCA) <10 g/L as VOC content per material

Product Manufacture

Gyprock Jointmaster 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 buckets of compound in a dry environment out of direct sunlight. Remove lid and stir prior to use. Unused product should be stored by resealing the original bucket. Remix prior to use. Discard if drying has commenced.

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.

Product Enquiry

Would you like to know more about this product? Please fill out the form below and one of our freindly team members will get back to you shortly.