Plasterboard Compounds

A plasterboard compound, also known as jointing or finishing compound, is used to fill joints, cover screws, and create smooth, seamless walls and ceilings. It ensures that plasterboard panels blend together perfectly before sanding and painting.

Westgyp stocks a variety of high-quality compounds to suit different applications:

• Westgyp Platinum Jointing Compound – Ideal for professional-grade joints, easy to sand, and provides a smooth, strong finish.
• Siniat Compounds – A comprehensive range of jointing and finishing compounds, including base coats, top coats, and all-purpose options. Known for their smooth application, strong adhesion, and reliable performance across both residential and commercial projects.
• Knauf Compounds – A premium selection of basecoat and finishing compounds designed for a smooth, durable finish. Ideal for jointing plasterboard systems, these products deliver excellent workability, adhesion, and a high-quality, paint-ready surface.

For a detailed explanation of the differences between compounds at different stages, check our All-Purpose vs Finishing Compound blog.

Jointing compounds are generally thicker and used to fill seams, embed tape, and cover screws. Finishing compounds are lighter, applied in thin layers, and designed to create a smooth surface ready for paint. Learn more in our All-Purpose vs Finishing Compound blog.

Yes. Westgyp compounds, Siniat All-Purpose, and Knauf LiteFinish are compatible with standard plasterboard, moisture-resistant boards, and fire-rated boards. Always check the specific product instructions for specialised boards.

These are just a few of the compounds Westgyp supplies — easy to work with and trusted by professionals across WA. Check out the full range of compound products above.

Westgyp compounds

• Westgyp Platinum

A high-performance, lightweight all-purpose compound that’s smooth and easy to mix. It spreads effortlessly, making it ideal for both taping and finishing. Sands down quickly to a fine, professional-grade surface with minimal effort.

Siniat compounds

• Siniat All-Purpose Lightweight

Exceptionally easy to work with — its light, creamy consistency makes application smooth and sanding effortless. Ideal for both DIY users and professionals needing an all-in-one solution.

• Siniat Mastaglide
  A ready-mixed finishing compound that glides on easily and trowels to a smooth, even surface. Perfect for final coats with minimal sanding required. Great for airless spray or hand application.

• Siniat Mastatape-In
  A specially formulated taping compound with strong initial grab and bonding. Easy to apply and tool off, making it suitable for fast, reliable tape bedding.

• Siniat Mastabase
  A high-coverage base coat compound that’s easy to apply and level. It delivers a strong foundation for finishing coats and works well for filling recessed joints and minor imperfections.

• Siniat MastaLine
  A premium finishing compound designed for top coats. Very smooth and easy to trowel, with excellent sanding characteristics. Ideal for achieving a flawless, paint-ready surface.

Knauf compounds

• Knauf Basecoat 60
  A fast-setting powder compound with a 60-minute working time — ideal for first coats and taping. Mixes easily, applies smoothly, and offers strong crack resistance. Great for speeding up workflow on-site.

• Knauf LiteFinish Finishing Compound
  A lightweight, ready-mixed finishing compound with a creamy texture. Easy to apply and sand, producing a consistent, high-quality finish with minimal shrinkage.

Drying times vary depending on the thickness of application, room temperature, and humidity:

• Thin layers usually dry in a few hours.
• Multiple coats or thick layers may require overnight drying. Always follow the manufacturer’s instructions for best results.

Yes. Once fully dry and sanded, all Westgyp, Siniat, and Knauf compounds provide a smooth, paint-ready surface. Primer is recommended before applying the final paint coat for optimal adhesion.

To minimise cracking and shrinkage to plasterboard compound:

• Apply the compound in thin layers.
• Use proper joint tape for seams.
• Allow each layer to dry fully before sanding or applying the next coat.

Products like Westgyp Platinum Jointing Compound are formulated to reduce cracking and shrinkage for a stronger finish.

Yes. Westgyp Platinum and Knauf LiteFinish are designed for professional use, offering consistent quality, easy application, and reliable performance on large-scale jobs. Siniat All-Purpose Lightweight is also versatile enough for both residential and commercial projects.