Grain Dams & Bunkers – Secure On-Farm Crop Storage Solutions
We have engineerd grain storage that protects harvests while empowering farmers and reducing waste through sustainable materials. A fully integrated welded mesh grain dam consists of the welded mesh wall, liner and cover; bunker tarps consist of the bunker floor tarp and cover — engineered for durability and year-to-year use in the harsh African climate.
1. Grain Dams (130-Ton Capacity)
Ideal for maize, sunflower seeds, sorghum & dry produce.
- ✅ Cost-saving alternative to commercial silos.
- ✅ DIY assembly – 2–3 units fit on one bakkie.
- ✅ All-inclusive kit.
Grain Dam Kit Includes
- Painted welded mesh walls (20 x 20cm apertures).
- Virgin 550g or 700g liner and cover options.
- Circular cover with tie-down eyelets.
- Reinforcing cables.
- Optional pre-liner for UV and chafe protection.
- Optional wall support brackets.
Specifications
- Diameter: 9m.
- Depth: 2.2m.
- Capacity: 130 tons.
- Smaller sizes available on request.
2. Grain Bunker Solutions
For large-scale farmers:
- ✅ Replacement ground sheets & covers.
- ✅ Custom-sized PVC geomembranes.
- ✅ Triple protection: blocks pests & rodents, seals out rain/wind/dust, and enables safe fumigation.
Material: reinforced 600g ice-blue UV-stabilised PVC.
Key Benefits
🌱 Harvest protection – eliminates spoilage; UV-resistant liners withstand 5+ seasons.
💰 Cost efficiency – store at the farm, eliminate silo fees; 40% cheaper than a steel bin.
🚜 Farm-tested durability – withstands farm conditions; -10°C to 60°C safe.
Technical Specifications
| Component | Grain Dam | Grain Bunker |
|---|---|---|
| Structure | Welded mesh | Not supplied |
| Liner | Green 550g/700g PVC | Bunker-blue 600g PVC geomembrane |
| Cover | Eyelet-secured PVC | Reinforced PVC tarp |
| Protection | Pest/weather proof | Weather + fumigation ready |
| Lifespan | 5–10 years | 5–8 years |
Why Farmers Trust Rainbow
“We saved serious money in silo fees last season using three grain dams!” – Jaco V., Free State Maize Farmer
- Rapid deployment: assemble in 1 day.
- Low maintenance: hose-clean interiors/exteriors.
- Mildew resistant: inner liner and cover.
- Expert support: before, during and after installation.
📞 Call: (+27) 72 562 2658
📧 Email: sales@rainbowtarps.co.za
