Cement Australia Rapid Set Concrete Mix - Special formula sets hard in only 15 minutes depending on water content. This premium quality Australian Dry Mix concrete blend is packed to ensure the correct amount of concrete is at hand for the job. Features: Hardens in 15 minutes Requires approx. 2.5 L water per bag Premium quality - Australian made Conforms to AS 3700 Professional finish Ready-to-use: simply add water Suitable for exterior and interior use Durable and hard wearing Approx. 2 x 20kg bags per post hole Weight: 20kg NSW Pallet Qty: 60 bags VIC/QLD Pallet Qty: 84 bags Ideal for: Securing posts and poles into the ground Pergola posts Uprights Landscaping projects Small in-ground installations such as mailboxes