Passion Wall Film is a specialised silage bunker wall liner designed to eliminate a commonly overlooked source of spoilage – oxygen getting in from the sides and top edges of your silage clamp.
This side wall barrier film is extra thick and tough (100 microns / 4 mil), made to be draped along bunker walls and across the shoulders of the silage, where concrete or earthen walls can otherwise allow oxygen transmission.
By covering the silo walls with Passion Wall Film before filling, you create a continuous oxygen barrier from the walls to the top, greatly reducing waste at the silage shoulders and preserving more feed. Despite its impressive strength (to resist punctures on rough surfaces), it’s formulated to be lightweight enough for easy handling during installation and deliver the same market-leading seal as our best oxygen barrier films.
Seals the Silo Sides: Silage research and farm experience both show significant spoilage tends to occur along the pit edges and shoulders if not properly sealed. Passion Wall Film addresses this by providing an air-tight lining on bunker/trench walls, preventing oxygen from seeping through cracks or porous walls into your silage. By extending this film up and over the top of the silage (under the main cover), you effectively shrink-wrap the entire silage mass from the sides.
The result is dramatically less spoiled feed on the edges – studies found using sidewall plastic halved the losses of silage near the walls compared to no side liner. For the farmer, that means more tonnes of quality silage, especially from the usually problematic upper shoulders.
Rugged & Puncture-Resistant: Bunker walls can be abrasive (rough concrete, brick, or even sharp gravel on earth walls). Passion Wall Film is built to withstand such harsh contact. It’s thicker and stronger than standard sheeting, so when you press silage against it or when you walk on it during filling, it won’t easily tear. It also resists damage from the silage itself (like stalky corn silage or dry haylage stems that might poke through a thinner plastic). This durability on rough surfaces ensures the seal stays intact all season. You won’t find nasty holes on the sides when you uncover the pit – meaning no surprise pockets of rot where air got in.
Large Coverage with Less Weight: Uniquely, Passion Wall Film manages to be heavy-duty yet relatively lightweight and flexible. It comes in wide rolls that can cover tall silo walls, but one or two people can still handle and hang it because the material is optimised for a good strength-to-weight ratio. It drapes easily, conforming to wall contours. This is important because wrestling a super-thick tarp up a wall can be dangerous and time-consuming – Passion Wall Film eases that issue. Farmers can line their pits faster and more safely, and distributors can highlight that this product doesn’t require special equipment to install (no lift or dozens of workers needed).
Reduces Spoiled Shoulders: By using wall film, you effectively eliminate the usual band of spoiled silage at the top edges of the silo. Those shoulders often suffer because it’s hard to pack them densely and the main cover may not seal perfectly against the side. This product closes that gap. It covers the side and then overlaps onto the top of the silage, so when you put your main cover over, you have plastic-to-plastic contact at the interface (or plastic-to-wall, both sealed). That means no open avenue for air at the sides. Consequently, the silage in the corners and edges ferments well instead of spoiling. You save on labour too – no more scraping out heaps of mouldy silage along the walls at feed-out.
Complements Any Cover System: Passion Wall Film is a team player – it works with any top cover (Passion Ag films, conventional plastics, tarps, etc.) to improve their effectiveness. It’s thin enough to fold over and lie flat under your top sheet without making lumps.
Whether you’re using an ultra-oxygen barrier like Passion Yellow or a single-sheet cover, adding wall film will boost overall preservation. Think of it as extending your oxygen barrier from “wall to wall.” Even if a farm doesn’t use other Passion Ag covers, this wall film can be recommended as an add-on to drastically improve their current system. It’s an easy upsell for distributors because it addresses a known pain point and works independently.
Protects Walls and Reduces Effluent: Silage effluent is highly acidic and can corrode concrete walls over time. By lining bunker walls with Passion Wall Film, you create a physical barrier that shields the structure from direct acid contact, helping extend the life of your clamp. At the same time, the film improves fermentation near the walls by blocking oxygen – reducing spoilage and limiting the production of effluent in the first place. It’s an effective way to protect both your forage and your infrastructure.
Before filling your bunker or trench silo, line the walls with Passion Wall Film. Roll it out along the length of each wall, allowing excess at the bottom (to fold under the silage) and enough at the top to fold over once the clamp is filled. To keep it in place during filling, temporarily secure the film with clips or tape.
As silage is added and compacted, the film will be pressed firmly against the walls, creating an effective oxygen barrier. Once filling is complete, fold or tuck the wall film over the silage according to your preferred method—there are various techniques, but the key objective is always the same: to overlap all plastic layers and create a continuous, airtight wrap around the forage.
Finish by securing the entire clamp with weights. Pay particular attention to the join between the wall film and the top cover—use plenty of gravel bags along this seam to maintain a tight, secure seal.
Passion Wall Film is suitable for both bunker and trench silos. It’s especially valuable where walls are uneven or where side spoilage has been a recurring issue. Distributors should recommend it to any farmer using a clamp—lining the walls is a proven step in modern silage management, and with Passion Wall Film, it’s both simple and effective.
Protect Your Investment from All Sides: Don’t let the edges of your silage be an afterthought. Passion Wall Film ensures that no portion of your silage is left vulnerable – not even at the tricky sides and shoulders.
By incorporating this heavy-duty wall liner into your silage covering routine, you can achieve a nearly bunker-wide seal, leading to less waste, better forage quality, and higher profitability from your crop. It’s a smart, cost-effective step that can yield big results.
So, if you’re serious about maximising silage preservation, make Passion Wall Film your go-to choice for bunker wall protection – and enjoy seeing clean, well-fermented silage all the way to the outer edges of your clamp.