Why Choose Polyethylene Over Steel for Your Rubbermaid 100-Gallon Stock Tank?
The Rubbermaid 100-Gallon Stock Tank is a staple on farms and homesteads across the UK and Ireland, but the material choice matters more than you might think. While steel tanks have been the traditional workhorse, modern polyethylene offers distinct advantages in weight, corrosion resistance, and thermal management. In this review, we break down the real-world differences between the two materials so you can decide which suits your livestock and your budget.
How Does Polyethylene Compare to Steel in Durability and Longevity?
Polyethylene is a high-density plastic (HDPE) that does not rust, corrode, or dent like galvanised steel. The Rubbermaid 100-Gallon Stock Tank is rotationally moulded from UV-stabilised polyethylene, which means it resists cracking even in freezing temperatures down to -20°C. Steel tanks, by contrast, are prone to rust at weld points and along the bottom edge, especially if the galvanised coating gets scratched. In a typical UK livestock setting, a polyethylene tank can last 15–20 years with minimal care, while a steel tank may need replacement after 8–12 years due to corrosion. However, steel is stronger against heavy impact—a cow kicking a steel tank might leave a dent, but the same force can crack an older polyethylene tank. For most low-stress grazing operations, polyethylene wins on lifespan.
Is Polyethylene or Steel Easier to Clean and Maintain?
Maintenance is a practical concern for every stockman. Polyethylene is non-porous and smooth, so algae and biofilm struggle to adhere. A stiff brush and a mild disinfectant solution are usually enough to keep the Rubbermaid 100-Gallon Stock Tank clean. Steel tanks require more frequent scrubbing because rust flakes and mineral deposits create crevices where bacteria breed. If you use hard water, steel tanks develop limescale more rapidly. Polyethylene also handles bleach and iodine dips better without staining or degrading. On the flip side, steel tanks can be pressure-washed more aggressively without risk of cracking. For most routine cleaning, polyethylene requires less effort and no special protective coatings.
How Do Material Options Affect the Water Temperature Inside the Tank?
Water temperature is crucial for livestock hydration, especially in winter. Polyethylene has natural insulating properties—the Rubbermaid 100-Gallon Stock Tank’s thick walls keep water several degrees warmer than steel in freezing weather. In a field test at -5°C ambient, water in a polyethylene tank stayed at 4°C for 12 hours longer than an equivalent steel tank. In summer, polyethylene reflects more sunlight, keeping water cooler and reducing algae growth. Steel tanks absorb heat rapidly and can become uncomfortably warm for cattle on hot days. If you keep livestock outdoors year-round, the polyethylene tank’s thermal performance is a clear advantage. There is no practical way to retrofit insulation on a steel tank without adding cost and complexity.
What Is the Price Difference Between Polyethylene and Steel Versions?
The Rubbermaid 100-Gallon Stock Tank in polyethylene typically retails for £180–£220 in the UK and €210–€250 in Ireland, depending on VAT and supplier. A comparably sized galvanised steel tank from a major brand runs £250–£310, reflecting higher raw material and fabrication costs. However, the polyethylene tank is significantly lighter—about 18 kg versus 45 kg for steel—which reduces delivery charges and makes handling easier. Over the service life, polyethylene costs roughly 30% less per year of use when factoring in lower replacement frequency and minimal maintenance. The upfront saving plus durability makes polyethylene the better value for most commercial and hobby farms.
Which Material Is Safer for Livestock in Terms of Sharp Edges and Weight?
Safety is a non-negotiable factor. The Rubbermaid 100-Gallon Stock Tank is designed with rounded rims and no sharp edges, reducing the risk of cuts to lips, tongues, or hooves. Polyethylene is also lightweight, so a single person can tip it to scrub or move it. Steel tanks often have rough edges at seams or after rust flakes develop, and their weight (45 kg+) means you need two people for repositioning. A steel tank dropped on a concrete floor can crack a hoof or cause a leg injury. Polyethylene will bounce or dent, but it will not shatter dangerously. For calving pens or areas with young stock, polyethylene is the safer choice.
How Do Weather and Sunlight Affect Each Material Over Time?
UV exposure is a common worry with plastics, but the Rubbermaid 100-Gallon Stock Tank uses UV-stabilised HDPE that resists fading and embrittlement for at least 10 years in full sun. Steel tanks, especially those with painted finishes, chalk and peel after 3–5 years of intense sunlight. In coastal areas with salt spray, steel corrodes rapidly; polyethylene remains unaffected. In very cold climates, steel tanks can crack at welds due to ice expansion, whereas polyethylene flexes slightly to accommodate freezing water without splitting. For farms in exposed, changeable weather, polyethylene is more resilient.
Material Comparison Table: Rubbermaid 100-Gallon Stock Tank vs. Typical Steel Stock Tank
| Feature | Polyethylene (Rubbermaid) | Galvanised Steel |
|---|---|---|
| Weight (empty) | 18 kg | 45 kg |
| Rust resistance | None (never rusts) | Susceptible at seams and scratches |
| Impact strength | Good (flexes under load) | High (dents instead of crack) |
| Thermal insulation | Moderate (keeps water warmer in winter) | Poor (heat loss rapid) |
| UV stability | 10+ years with stabiliser | 3–5 years before paint/coating failure |
| Cleaning ease | Non-porous, easy to scrub | Porous if rusted, requires effort |
| Safe for livestock | Rounded edges, no sharp points | Potential sharp edges after corrosion |
| Average price (UK) | £180–£220 | £250–£310 |
| Expected lifespan | 15–20 years | 8–12 years |
What Owners Say About Polyethylene vs. Steel Stock Tanks
Farmers on UK forums consistently report that the Rubbermaid 100-Gallon Stock Tank in polyethylene is “lighter than you expect” and “easy to move around the field.” One dairy farmer in Shropshire noted that switching from steel to polyethylene saved him two hours per week on cleaning because algae buildup dropped noticeably. Another owner in Wales commented that after three harsh winters, his polyethylene tank had no cracks, while his neighbour’s steel tank needed patching. The most common complaint about polyethylene is that it can float if emptied and placed on soft ground, but that rarely matters for a full tank. Steel owners often mention the peace of mind that it won’t crack if frozen solid, though that advantage is overstated—polyethylene tanks flex without splitting in most UK winters.
Frequently Asked Questions
Q: Can I use the Rubbermaid 100-Gallon Stock Tank in sub-zero temperatures?
A: Yes. The polyethylene material is rated to -20°C and will not crack from ice expansion. Steel tanks may suffer weld failure if ice forms near seams.
Q: Is a steel tank stronger than a polyethylene tank for large livestock?
A: Steel is stronger against direct impact, but polyethylene flexes under load. Neither will fail under normal use with cattle or horses. Polyethylene is safer if a hoof strikes the side because it absorbs energy.
Q: How do I clean algae from the Rubbermaid 100-Gallon Stock Tank?
A: Use a stiff nylon brush and a mixture of water and white vinegar (1:10) or a livestock-safe disinfectant. Avoid abrasive pads that could scratch the surface. Rinse thoroughly before refilling.
Q: Will the polyethylene tank fade or become brittle in strong sun?
A: The UV stabilisers prevent significant fading for about 10 years. Brittleness is unlikely unless the tank is stored empty in direct sunlight for extended periods. Keep it partly shaded for maximum lifespan.
Q: What is the weight difference when full?
A: A full 100-gallon tank of water weighs roughly 454 kg. The empty tank weight (18 kg for polyethylene, 45 kg for steel) makes little difference when filled, but handling and positioning are easier with the lighter polyethylene model.
Q: Can I repair a cracked polyethylene tank?
A: Small cracks can be repaired with a plastic welding kit or polyethylene-approved adhesive. Large cracks (over 10 cm) usually mean replacement is more cost-effective. Steel tanks can be welded but rust often reappears around the repair.
