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Small Path

Small Slabs

Garden edging

Our OneMix Rapid Set is our fastest drying formula, made from a special blend of cement, aggregate, sand and additives designed to rapidly harden without any mixing. This quick-setting product is best suited to small jobs that require little preparation, such as setting fence posts, clothes lines and letter boxes.

Why you need this product:

Fast-setting formula perfect for quick jobs

No mixing required

Add clean water and the product will harden in 15 minutes

Compressive strength of 25MPa when fully cured

Available in:

  • 20kg or 30kg bags

* MPa is the metric unit for pressure or stress called megapascal (MPa). The term is used in concrete as the common unit for compressive strength.

How to build a fence using OneMix Rapid Set

OneMix presents an easy, step-by-step guide on how to use OneMix Rapid Set when building a fence.


Post Hole Dimensions


Post Type


Results (Approximate)

Volume of concrete =
No. Bags Required
Volume of Water per bag