In the demanding world of South African agriculture, reliable storage is key to safeguarding your hard-earned yields. Trunel’s silo bags offer a practical, cost-effective solution for grain storage, designed to shield crops from pests, moisture, and spoilage. Crafted from premium multi-layer polyethylene, these quality silo bags ensure long-term preservation while allowing easy installation on your farm. As South Africa’s trusted packaging partner since 2008, we help farmers minimize losses and maximize value – all at competitive prices with nationwide delivery.Â
With post-harvest losses for maize in South Africa reaching 14.9%, effective storage like our best silo bags can make a real difference in preserving your grain’s quality and nutritional value.
We also offer polypropylene bags on sale. Trunel Bags is the #1 leading weed mat manufacturer in South Africa.
Why Trunel’s Silo Bags Are the Best Choice for Grain Storage

At Trunel, we prioritize durability, affordability, and eco-friendly practices in every product.
Our silo bags are engineered for the rigors of farming, drawing on our expertise in polypropylene and plastic solutions to deliver dependable performance.
Here’s what makes them stand out:Â
- Superior Protection: Multi-layer construction (up to 240 microns thick) blocks UV rays, resists punctures, and creates a hermetic seal to control oxygen levels, reducing insect activity and fungal growth without chemicals – ideal for organic farming.Â
- Cost-Effective Storage: Store up to 200 tonnes per bag at a low cost per tonne, helping you avoid expensive on-farm silos while negotiating better freight rates outside peak seasons.Â
- Quality Preservation: Maintain grain moisture and temperature below ambient levels, ensuring minimal weight loss and retained protein content – research shows hermetic silo bags can keep fungal counts low and prevent spoilage over months of storage.Â
- Easy and Flexible Use: Roll out and fill with standard equipment; available in sizes like 9ft x 60m for maize, wheat, or sorghum. UV-treated for outdoor durability in Gauteng’s harsh sun or beyond.Â
- Eco-Friendly Design: Fully recyclable materials align with sustainable farming, reducing waste and supporting your commitment to the environment.Â
- Tailored Support: From custom printing for branding to expert advice on site preparation, our team ensures seamless integration with your operations.Â
In sub-Saharan Africa, where handling and storage contribute to 8% of cereal post-harvest losses, solutions like our quality silo bags provide an economic edge for producers.Â
How Trunel’s Silo Bags Work for Effortless Grain Storage
Getting started is straightforward, backed by our commitment to service excellence:Â
- Site Preparation: Choose a flat, well-drained area on your farm – no special foundations needed.Â
- Filling the Bag: Use compatible loaders to fill the silo bag, stretching it to expel air and create an anaerobic environment rich in CO2 for natural pest control.Â
- Sealing and Monitoring: Secure the ends and monitor via simple sampling ports; store for up to 18-24 months with minimal intervention.Â
- Retrieval: Unload with ease using out-loading equipment, preserving grain quality from field to market.Â
Our best silo bags hold grains like maize, wheat, barley, and soybeans securely, with three-layer designs (white outer for solar reflection, black inner for light blockage) ensuring watertight performance.Â
Frequently Asked Questions
Silo bags are large, hermetic polyethylene tubes used for temporary on-farm storage of grains. They create an airtight environment that naturally controls pests and moisture, reducing spoilage and preserving quality – a cost-effective alternative to traditional silos.
Our standard quality silo bags are 9ft (2.7m) diameter by 60m long, holding up to 200 tonnes of grain. Custom lengths and thicknesses are available to suit your needs.Â
Yes, our best silo bags are chemical-free, relying on hermetic sealing to eliminate insects and fungi, making them ideal for organic grains without compromising certification.Â
By maintaining low oxygen and high CO2 levels, silo bags prevent insect development and microbial growth, minimizing losses to under 1% in controlled studies – far better than open storage methods.
Installation is simple: Prepare a level site, unroll the bag, fill using a loader to stretch and seal it airtight. No specialized skills required – our team can guide you.
Grains can be safely stored for 12-24 months, depending on initial moisture (ideally 14-18%) and climate. Regular sampling ensures optimal conditions.Â
Absolutely – UV-stabilized and puncture-resistant, our quality silo bags withstand extreme heat, rain, and wind, with multi-layer protection for long-term reliability.Â
Pricing starts competitively at around R8,000 per bag (excl. VAT), with bulk discounts available. Contact us for a tailored quote based on volume and specs.Â
