Boss Grout A – Class A Non-Shrink Grout

Class A grout is a high-strength, cement-based material used to fill voids, secure bolts and create a stable support layer under elements such as baseplates, machinery and precast components. It is designed to maintain contact as it cures and delivers consistent load transfer.

Under AS 1478.2, Class A grout identifies a general-purpose non-shrink grout suitable for a wide range of structural applications. It is chosen for its strength, predictable performance and suitability across most grouting tasks on a commercial site.

Common uses for non shrink grout include:

• Grouting under baseplates and machinery
• Anchoring bolts and dowels
• Filling voids in precast concrete
• Structural repair and bearing pads
• Crane rails, stanchions and precast panels

These jobs rely on a grout that develops strong, even contact across the surface.

Yes. Boss Grout A is suitable for both indoor and outdoor work. As with any cement-based material, the key is managing the curing conditions so the grout gains strength evenly.

Yes. Its non-shrink properties and controlled consistency make it ideal for precision work, including machine baseplates and structural supports that require uniform bearing.

Yes. Proper curing protects the grout during early hydration and supports long-term performance. After placement, cover the surface with wet hessian and builders plastic

or apply a suitable curing compound. These measures help prevent rapid moisture loss and support full-strength development.