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Cement Australia Hydrated Lime (20kg) is a fine, white powder produced by hydrating quicklime (calcium oxide) to form calcium hydroxide. It is widely used in masonry, soil improvement, and mortar mixes to enhance performance, especially in outdoor landscaping applications.

Uses of Hydrated Lime

Improving Mortar for Brick & Block Work

• Increases workability, water retention, and reduces cracking.

Garden Bed Walls, Retaining Walls & Edging

• Enhances the quality of mortar used in these structures.

Rendering & Plastering

• Used in traditional renders for improved adhesion and flexibility.

Soil pH Adjustment

• Neutralises acidic soils, improving plant health and nutrient uptake.

Stabilising Clay Soils

• Binds particles, reducing movement in pathways and under pavers.

Limewash for Garden Structures

• Can be used as a natural whitewash on brick, stone, or timber features.

How to Use Hydrated Lime

For Mortar (General Mix)

Add to improve workability and reduce cracking:

1 part cement

1 part hydrated lime

5–6 parts sand

Add water gradually to achieve a smooth, spreadable consistency.

Ideal for garden walls, edging, letterboxes, and pavers.

For Soil Conditioning

Lightly spread lime over the garden bed or lawn area (rate: ~100g/m², but test soil pH first).

Mix into the top 10–15 cm of soil and water thoroughly.

Best applied weeks before planting to allow the pH to stabilise.

For Limewash

Mix hydrated lime with water (and optionally salt) to create a whitewash solution.

Apply with a brush to masonry, timber, or stone surfaces.

See back of pack for additional mix guide instructions.

Benefits of Hydrated Lime in Landscaping

Enhances Mortar – Improves plasticity, bonding, and long-term durability of mortar and render.

Water Retention – Mortar remains workable longer, especially in dry or hot conditions.

Crack Resistance – Reduces shrinkage and cracking in masonry joints.

Soil Amendment – Raises soil pH, beneficial for gardens with acidic conditions.

Soil Stabilisation – Helps bind clay-heavy soils for better compaction under paths or slabs.

Eco-Friendly Limewash – A natural, breathable surface treatment for garden structures.

Convenient 20kg Bag – Great for both DIY and professional landscaping applications.

This text is designed to provide basic information, ideas and tips to support your project, it is not professional advice.