{"product_id":"rapid-set-post-mix-concrete-20kg","title":"Rapid Set Post Mix Concrete 20kg","description":"\u003cp\u003eRapid-setting post mix concrete for setting galvanised steel retaining wall posts. Just pour dry mix into the hole around the post, add water, and it sets in approximately 15–20 minutes — no mixing required. Ideal for DIY and tradie use.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e20kg bag — suitable for one standard post setting (300–400mm diameter hole, 200mm depth of concrete)\u003c\/li\u003e\n\u003cli\u003eSets in 15–20 minutes, full strength in 24 hours\u003c\/li\u003e\n\u003cli\u003eFor deeper embedment or larger posts, use 2 bags per post\u003c\/li\u003e\n\u003cli\u003eCompatible with all steel H-beam and C-channel retaining wall posts\u003c\/li\u003e\n\u003cli\u003eConforms to AS 3972 Type GP cement standard\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Order approximately 1–2 bags per post depending on post diameter and embedment depth. A 10-post wall typically requires 10–20 bags.\u003c\/p\u003e","brand":"Retaining Walls Direct","offers":[{"title":"20kg Bag","offer_id":52324478943512,"sku":"POSTMIX-20KG","price":28.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/hf_20260622_134045_fb61fe5d-98ae-4916-9be3-007c08347465.png?v=1782166718","url":"https:\/\/www.retainingwallsdirect.com.au\/products\/rapid-set-post-mix-concrete-20kg","provider":"Retaining Walls Direct","version":"1.0","type":"link"}