Ditch heavy concrete bags and set fence posts faster with Expanda-Crete – the professional-grade, high-density closed-cell polyurethane expanding foam for rock-solid post installations.
This easy-to-use 2-part kit mixes into a water-blown foam that expands to fill the hole, delivering 3x the compaction strength of average soil. Perfect for Colorbond fences, strainer posts, gate posts, mailboxes, flag poles, retaining walls, and even large commercial jobs. Because Expanda-Crete expands with pressure from the bottom, the hole can be smaller and do a better job.
Sets in just 1 hour – no next-day return needed. Ideal for rural work because there is no need for water and it saves massive space on your ute (one kit = ~20 bags of rapid-set concrete!).
Bulk Kit Details (Approx 7.5 Litres Mixed):
· Yields 15–18 litres expanded foam
· Sets 10 standard posts (250mm x 600mm holes)
· 30mm poured depth expands to ~500mm fill; 60mm to ~1 metre
· Smaller holes possible – expands upward with pressure for superior hold
Kit Includes:
· 1 x Part A bottle
· 1 x Part B bottle
· 2 x disposable stirring wands
· 2 x measuring cups
· (Mixing containers supplied by customer)
10 Reasons to Choose Expanda-Crete:
1. Fast, easy & convenient alternative to concrete
2. Simple 2-part liquid – mix, stir, pour
3. High-density, closed-cell polyurethane foam
4. 3x stronger compaction than average soil
5. Quick 1-hour set – keep working same day
6. No CFCs or HFCs
7. Environmentally neutral – no soil impact
8. No water needed – perfect for remote jobs
9. No wasted bags of cement
10. Mix only what you need – zero waste
Post Depth Guide:
· Line posts: ¼ of total post length
· Corner/gate posts: ⅓ of total post length
Free shipping on all orders! Bulk buys and save more.
Trade enquiries welcome. Shipping from Toowoomba via Australia Post or courier. For usage advice or larger quantities, call (07) 4662 5424.
Switch to Expanda-Crete expanding foam – lighter, faster, stronger post setting for pros and DIY!