Wilcocks Brothers of Watford Ltd.

Your Complete Grain Handling & Barn Equipment Dealer

Bulk Bins

PolyDome Bulk Bins
Designed to Handle High-Moisture Corn and Soybeans


PolyDome Bulk Bins


Standard Features
  • Translucent polyethylene allows you to see material level
  • Made from high-impact, UV stabilized polyethylene.
  • Corrosion resistant
  • Nestable for shipping
  • Easy cleaning
  • Smooth surface reduces bridging
  • Heavy-Gauge steel support frame with baked-on polyester powder coat finish
  • Large, vented filler cap with pull rope for ground access
  • Sturdy outside ladder
  • Slide valve standard
  • Boot for 4’ or 6” auger avail.
  • Available in 9 sizes: .5, .75, .8, 1.5, 2.5, 3.5, 4.5, 6.5 and 8.5 ton capacity
  • Easy installation and set-up
  • All mounting hardware included

PolyDome Bulk Bins are the perfect choice for handling highmoisture corn, soybeans, and other granular materials. They are made of high-density polyethylene which will never rust or corrode. PolyDome Bulk Bins will always remain clean and attractive.

The interior surface of PolyDome Bulk Bins is very smooth to reduce bridging. Plus, since they are just 2- piece construction there are no rivets and grain-clogging seams to contend with. The translucent polyethylene allows you to visually check material line from the outside.

All PolyDome Bulk Bins have a 22" top opening with a hinged, vented filler cap and a pull rope that allows ground control for filling.

There are 3 different transition collars available for the slide valves– 90°, 45°, and 30° angles. (See Accessories on page 18.) The new style collar allows easier attachment to the bottom cone with little or no cutting necessary. Our slides feature a galvanized plate and guide system. Our auger boots will attach to any of our slide valves and handle 4" or 6" augers. The auger boots have a clean out access cover.

All PolyDome Bulk Bins have a 16" hole in the bottom cone. The .8 ton bin has 38" of ground clearance to the slide valve. The 1.5, 2.5, and 3.5 ton bins have 15" ground clearance under the slide valves. The 4.5, 6.5, and 8.5 ton bins have 14" ground clearance under the 90° slide valve; and 11" ground clearance under the 30° slide.

PolyDome Bulk Bins feature heavy-duty support frames with extra large secure plates for more holding power. They have flat strap cross bracing for increased stability. The .5 – 3.5 ton units come standard with 4 legs; the 4.5 thru 8.5 ton units have 6 legs. The legs have large support tabs which can be bolted to concrete for added stability especially on the larger units.

All PolyDome Bulk Bins have a sturdy ladder with slip guard. It is braced securely to the top of the tank near the filler cap.

All hardware is supplied. Erection time is one-third of steel bins. Time is money!

Frames have a baked-on polyester powder coat finish which resists corrosion.

It is recommended that you use a concrete pad at least 5 1/2" thick for our 4.5 ton thru 8.5 ton units.




Size Specification Chart
Ton Size Cubic
Diameter Weight
.5 30 24 78" 52" 180 lbs.
.75 47 37 9' 68" 300 lbs.
.8 40 32 10' 10" 50" 300 lbs.
1.5 75 60 9' 6" 74" 470 lbs.
2.5 130 104 11' 5" 74" 500 lbs.
3.5 180 144 13' 5" 74" 540 lbs.
4.5 220 176 12' 6" 96" 800 lbs.
6.5 325 260 16' 96" 850 lbs.
8.5 425 340 19' 6" 96" 950 lbs.
PolyDome Bulk Bins are designed to nest for shipping



PolyDome .8 Ton Bulk Bin PolyDome .5 Ton Bulk Bin
Vented Filler Cap
Vented Filler Cap



Bulk Bin Accessories
Bulk Bin Boot Accessories

PolyDome has many accessories available to allow you to customize any of our Bulk Bins to meet your needs. All accessories are made of the same high-impact polyethylene as our PolyDome Bulk Bins.

Anchor Bolt Patterns for Bulk Bins
Anchor bolts should be drilled into a 5-1/2” concrete slab. All dimensions are approximate.

Anchor Bolt Pattern
Anchor Bolt Pattern
Anchor Bolt Pattern