Mini foam wall berms · Foam wall bunds
Foam wall spill berms
Flexible PVC spill containment trays with foam-filled walls. Place them under drums, generators and machinery, or where carts, hand trucks and foot traffic have to cross; the walls press down and spring back. We make them in our Taizhou factory to any size.
- Made to any length and width
- Foam walls stand on their own, no brackets
- Step on or roll a cart over the wall; it springs back
- Folds flat for storage and shipping
- OEM and private label for distributors
What is a foam wall spill berm?
A foam wall spill berm is a portable secondary containment tray. The floor and wall sleeves are PVC-coated polyester; foam sealed inside the sleeves keeps the walls up. Leaks and drips stay on the floor inside the walls instead of reaching the ground or a drain.
Small units are also sold as mini foam wall berms or foam wall spill containment berms. In the UK and Europe the same product is a foam wall bund, and buyers search for portable foam wall bunding.
Unlike bracket wall berms, there is nothing to assemble: unfold it and the walls stand. Unlike a rigid drip tray, it folds flat and wheels can roll over the edge.
Features
Self-supporting foam walls
Foam sealed inside each wall sleeve holds the wall upright as soon as the berm is unfolded. There are no brackets or stakes to fit.
Step-over, drive-over access
Carts, wheels and boots press the wall down and it recovers. Equipment goes in and out without lifting it over a rigid lip.
Welded, liquid-tight floor
PVC-coated polyester is CNC-cut and joined by high-frequency or hot-air welding, so there are no stitch holes in the containment area.
Folds flat
Empty berms fold into a compact pack. The hook-and-loop strap on the wall keeps the folded berm closed in a vehicle or store room.
Any size
Squares, long rectangles and one-off footprints are cut to order, so the berm fits the generator, drum rack or vehicle it sits under.
High-visibility yellow
Yellow marks the containment area on a busy workshop floor or job site and makes leaks easy to see.
The floor is PVC-coated polyester, not a PE tarp. How the fabric is built, and how we weld it.
Sizes and capacities
Every berm is made to order, in any length and width. The sizes below are common starting points; capacity is geometric (inner floor size × wall height) before anything is placed inside.
| Ref. | Inner floor size | Capacity by wall height | |
|---|---|---|---|
| 4 in (100 mm) wall | 6 in (150 mm) wall | ||
| FW-2x2 | 2 × 2 ft 610 × 610 mm | 10 US gal 38 L | 15 US gal 57 L |
| FW-2x4 | 2 × 4 ft 610 × 1220 mm | 19.9 US gal 76 L | 29.9 US gal 113 L |
| FW-3x3 | 3 × 3 ft 915 × 915 mm | 22.4 US gal 85 L | 33.7 US gal 127 L |
| FW-4x4 | 4 × 4 ft 1220 × 1220 mm | 39.9 US gal 151 L | 59.8 US gal 227 L |
| FW-4x6 | 4 × 6 ft 1220 × 1830 mm | 59.8 US gal 227 L | 89.8 US gal 340 L |
| FW-4x8 | 4 × 8 ft 1220 × 2440 mm | 79.8 US gal 302 L | 120 US gal 453 L |
| FW-5x5 | 5 × 5 ft 1525 × 1525 mm | 62.3 US gal 236 L | 93.5 US gal 354 L |
| FW-6x6 | 6 × 6 ft 1830 × 1830 mm | 89.8 US gal 340 L | 135 US gal 510 L |
Need another size, a long narrow berm or a higher wall? Send the dimensions. 4 in and 6 in are our standard wall heights; other heights are made to order.
Why these figures look smaller than the ones in the catalogue
Put our 3 × 3 ft berm next to the same size in a well-known catalogue and ours appears to hold less. It does not. The two numbers are measured from different places, and it is worth knowing which is which before you size anything to a rule.
Published berm capacities in this market are commonly calculated from the outside dimensions — the catalogue lists outside length × width × height, and the capacity is those same outside figures multiplied together. But the foam walls stand on the floor sheet. They take up part of that footprint, and liquid only ever occupies the space inside them.
Every figure on this page is calculated from the inner floor size instead. On a big berm the difference is small. On a small one it is not:
| Berm, 4 in wall | Worked from outside dimensions | Worked from the inner floor |
|---|---|---|
| 3 × 3 ft | 22.4 US gal | about 13.6 US gal |
| 10 × 10 ft | 249 US gal | about 217 US gal |
| 72 × 15 ft | 2,693 US gal | about 2,549 US gal |
The right-hand column is not an estimate. Our wall is square in section — as wide at the base as it is tall — so on a 4 in wall the inner floor is 8 in shorter than the outside size on each axis. That is a sum you can check against any berm you are comparing ours to.
This is not a complaint about anybody's catalogue — it is a warning about mixing the two. If you have to hold 110% of a tank and you choose a berm on a figure worked the other way, you can end up short by more than the margin you thought you were building in. Tell us the inner size you want, or tell us the volume you have to hold and we will work back to the inner size for you.
Work out a size
Enter the inner floor size and wall height to see the geometric capacity. To size for a regulation, start from the container volume you must hold, subtract the volume of anything standing inside the berm, and allow for rain outdoors.
Specifications
| Product | Foam wall spill berm (mini foam wall berm; foam wall bund in the UK) |
|---|---|
| Construction | PVC-coated polyester floor and wall sleeves, CNC-cut, high-frequency or hot-air welded |
| Fabric weight | 18 oz/yd² (610 g/m²) as standard, or 22 oz/yd² (745 g/m²) heavy duty where the ground or the traffic is rough. We also run 40 oz/yd² (1355 g/m²) for rail work |
| Wall | Closed-cell polyethylene foam, sealed inside a welded sleeve. Closed cell, not open cell: a wall that has to stand in standing liquid — and on some of our berms float up in a spill — cannot be a sponge, and a cut in the cover does not turn it into one. The wall is square in section, as wide at the base as it is tall. A 4 in (100 mm) wall takes 4 in of floor along each side, a 6 in (150 mm) wall takes 6 in — so the inner floor is always the outside size less twice the wall height. 4 in and 6 in are our standard heights; others are made to order |
| Sizes | Any length and width, made to order |
| Colour | High-visibility yellow as standard. Yellow, black, blue, orange and green, at no extra cost and with no separate minimum — the colour is a choice of fabric roll, not a pigment batch, so changing it costs us nothing and we do not charge for it |
| Temperature range | Ask us with your climate and your liquid. We would rather check the fabric and the foam against your conditions than publish one range and have you assume it covers a cold store or a desert yard |
| Strap | Hook-and-loop strap on the wall to keep the folded berm closed |
| Options | Drain valve, handles, ground tarp, track belt, carry bag, repair kit. All of them. Ground tarps, track belts, skirts, carry bags and repair kits are made in our own factory rather than bought in, so they are quoted and shipped with the berm as one order |
| Branding | Private label and custom packaging for OEM orders |
| Quality | Every berm — not a sample — is filled with water and left standing for two hours before packing, signed off by the production manager and given a batch number |
| MOQ | 20 units per size. That is low for made-to-order containment, and it is deliberate: a distributor should be able to test a size on a real order rather than commit to a container of it |
| Lead time | Production takes 15 working days for up to 50 units and 25 working days for 50 to 200. Above 200 units we schedule it with the order. The clock starts when your deposit reaches us, not when the order is placed |
| Samples | Samples take 5 working days. We charge for the sample — the amount depends on the size, so it is quoted with your request — and we refund that charge against your first production order. Sample freight is on the buyer |
| Folded size | Measured on a production sample rather than estimated, and not finished yet. Ask us for the current figure with your enquiry — it is the number this product is chosen on, so we are not going to approximate it |
| Packing | Every size packs differently, so there is no single carton spec worth publishing. Folded size, carton dimensions and gross weight go with the quotation for the sizes you are ordering — before you commit to freight, not after |
Where foam wall berms are used
Vehicle and fleet maintenance
Under engines, gearboxes and hydraulic hoses during servicing, or under parked trucks with a known leak.
Generators and light towers
Under portable generators, light towers and fuel tanks on construction and event sites.
Drums and small containers
Around drums, jerry cans and small tanks during storage, decanting or transfer.
Pumps, compressors and machinery
Under hydraulic power packs, compressors and pumps that drip oil or coolant.
Fuel and oil transfer
At temporary fuelling or oil-change points where a hose or fitting could leak.
Emergency response
Unfolded under a leaking vehicle or container to catch the flow while the source is dealt with.
Mini foam wall berm, drive-over berm or bracket wall berm?
Typical ranges across the market. We quote foam wall berms to your size; tell us if you are unsure which type fits.
| Type | Walls | Size | Best for |
|---|---|---|---|
| Mini foam wall berm | Foam, typically 4–6 in (100–150 mm) high | Typically 2 × 2 ft to 6 × 6 ft | Drums, generators, machinery, maintenance under a vehicle |
| Drive-through berm | Foam end walls that lie flat and float up; stay-braced long sides | Vehicle-sized, from about 10 × 16 ft up | Tankers, trucks and plant driving in and out repeatedly |
| L-bracket berm | Fabric held up by removable L-brackets, usually 8–12 in (200–305 mm) | Medium to very large | IBCs, tanks and larger volumes where walls stay up |
Need the higher wall? See L-bracket spill berms (loose brackets, sits close to a wall) or stay-supported spill berms (stays attached, nothing to lose). For a berm a truck drives through, drive-through spill berms. How all the berm types compare.
How to order
- Send the size and use: inner size or equipment footprint, wall height or capacity, the liquid, quantity and destination.
- Get a quote by email, with the options and packing for your order.
- Approve a sample for new sizes or private-label ranges.
- Production and shipment from our factory in Taizhou, Zhejiang, China.
For distributors
Build a foam wall berm range under your own name: your sizes, model codes, labels and cartons. We supply safety and spill-control distributors, catalogue sellers and rental companies in the US, UK and Europe.
Questions about foam wall spill berms
What is a foam wall spill berm?
A portable, flexible spill containment tray made of PVC-coated polyester, with foam sealed inside its low side walls. The walls stand up on their own, can be stepped on or driven over and spring back, and the berm folds flat when empty. Small units are often called mini foam wall berms.
Is a foam wall bund the same product?
Yes. "Berm" is the usual word in the US and Canada; buyers in the UK, Ireland and Australia say "bund" or "portable foam wall bunding" for the same foam-walled containment tray.
What sizes can you make?
Any length and width. Common starting points run from 2 × 2 ft (610 × 610 mm) to 6 × 6 ft (1830 × 1830 mm), and larger or long, narrow footprints are cut to order. Send the inner size or the equipment footprint with the clearance you want.
How much liquid does a foam wall berm hold?
Geometric capacity is inner length × inner width × wall height. A 4 × 4 ft berm with 6 in walls holds about 60 US gallons (227 litres). Subtract the volume of anything standing inside the berm, and allow for rain if it is used outdoors.
Can carts and wheels cross the walls?
Yes. Cart wheels, hand trucks and people cross the foam walls, which compress and recover. For forklifts and other small, hard wheels, or for frequent traffic, use a track belt and confirm the load with us first. For trucks and tankers driving in and out, this is the wrong product: use a drive-through spill berm, whose end walls are built for that.
Which liquids can it contain?
PVC-coated fabric is commonly used for diesel, lubricating oils and hydraulic fluids. Some fuels, solvents and aromatic chemicals attack PVC, so send the Safety Data Sheet of the liquid before you order.
Are foam wall berms EPA certified?
No containment product is EPA certified. Under the US SPCC rule the facility must provide adequate secondary containment, and a foam wall berm can be part of that when it is sized for the containers it serves.
Do you make foam wall berms under our brand?
Yes. OEM supply is our core business: we make foam wall spill berms for distributors, catalogue sellers and rental companies under their own brand and packaging.
Specifications on this page are confirmed with the factory; anything still marked TBC is a gap we have left visible rather than filled with a plausible number. Checked by the production team at Taizhou Fengxu Textile Industry Co., Ltd. on . How we verify what is on this site.
Quote a foam wall spill berm
Send the inner size or equipment footprint, the liquid, the quantity and the destination. We reply with a quote by email.