One of the most common questions in industrial packaging and protection is which foam suits which application. EVA, XPE, PE foam and polyurethane sponge look alike, but they differ markedly in structure and in where they belong.
EVA and XPE Foam
EVA (ethylene-vinyl acetate) is a dense, flexible foam. It absorbs impact well and takes precision die-cutting cleanly, which is why it is the usual choice for product-specific interiors. Automotive, electronics and furniture manufacturers use it for protection and for presentation alike.
XPE (cross-linked polyethylene) has a closed-cell structure that resists moisture and chemicals better than EVA. It is also lighter, so it comes into its own where shipping weight matters and where sensitive electronic equipment needs protecting.
PE Foam and Polyurethane Sponge
PE (polyethylene) foam is the economical, lightweight option. It is produced in a range of densities, which makes it the general-purpose choice when you need real impact absorption without a specialist price.
Polyurethane sponge differs from all three: its cells are open, which makes it effective for sound and vibration damping. It is highly flexible and easy to shape.
Open Cell vs Closed Cell
Most of the differences between these four come down to one structural distinction: whether the cells are open to each other or sealed. In closed-cell materials — EVA, XPE and PE foam — every cell is sealed in itself. The material does not absorb water, the cut edge does not shed, and it holds its volume under pressure. In open-cell polyurethane sponge the cells connect; compress it and it pushes the air out, which is what makes it soft and resilient.
In practice: closed cell is for protection and barrier, open cell is for damping and fill. Put open-cell sponge under a metal part destined for a damp warehouse and the material can hold moisture against it and stain it. Line a cabinet with closed-cell sheet and you will not get the acoustic result you wanted — sound needs a cell structure it can enter in order to be absorbed.
Choosing Density and Thickness
Density decides how much load the material carries, and more is not better. High-density sheet under a light product never compresses, so it does not absorb the impact — it transmits it straight through. Low-density foam under a heavy product crushes completely on the first impact and has nothing left for the second. The right density follows the surface pressure: product weight divided by the area actually resting on the foam.
Thickness is about drop height instead. The further the product can fall, the deeper the section needed to spread that energy. Our EVA, XPE and PE foam sheets run 1–50 mm; polyurethane sponge is sliced from 5 mm to 200 mm. Anything thicker is built by laminating sheets together.
Colour, Surface and Lamination
EVA is coloured through the mass, so the cut face comes out the same colour as the surface and needs no finishing. Where the material is visible — the inside of a presentation box — that alone can decide the choice. XPE and PE foam come in a narrower colour range and are usually paired with velvet or flock facing on show surfaces.
Lamination does more than add thickness: it lets layers of different density be combined. A firm layer underneath to carry the load, a soft layer on top where the product touches — behaviour you cannot get from a single sheet.
Does the Cutting Method Affect the Choice?
Less than people expect. All four cut on a steel-rule die, on CNC and on a waterjet; what decides the method is quantity and geometry, not material. A die is economical for repeat, high-volume work, CNC for low volumes and complex contours. The one place the material does drive the method is very thick sections and very soft sponges, where slicing and waterjet give the better edge.
The Short Version, by Application
Product-specific cavities and presentation quality: EVA. Moisture, chemical resistance or low weight: XPE. General-purpose, cost-led protection: PE foam. Sound, vibration or soft fill: polyurethane sponge. Most real projects use two of them together — PE foam filling the volume inside a crate, with a die-cut EVA cavity where the product actually touches.
Choosing the Right Material
The right choice depends on the weight and fragility of the product, the conditions it will meet in transit (moisture, chemicals, temperature) and the budget. Send us your dimensions and how the product will be shipped, and we can tell you which material fits.
Frequently asked questions
- Is EVA better than XPE?
- Neither is universally better. EVA absorbs more impact and die-cuts more precisely; XPE weighs less and resists moisture and chemicals better. The product's fragility and its shipping conditions decide it.
- Which foam handles moisture best?
- Closed-cell XPE and PE foams do not absorb water and hold up well against moisture. Open-cell polyurethane sponge can retain it, so closed-cell materials are the choice in damp environments.
- Which foam is used for sound insulation?
- Open-cell polyurethane sponge — acoustic pyramid foam in particular — is used for sound and vibration damping. Where the job is impact protection, EVA and XPE lead.
- What does sponge density mean, and what should it be?
- Density is weight per unit volume, and it sets how much load the sponge can carry. There is no single right figure — it follows the surface pressure, which is the product's weight divided by the area resting on it. Send us the weight and the contact area and we will specify it.
- Which material die-cuts best?
- All four die-cut. EVA leads for cavity interiors because the cut edge stays clean and the colour runs through the mass. For very thick sections and soft sponges, slicing or waterjet gives a better edge.
- How thick can the sheets be?
- EVA, XPE and PE foam sheets run 1–50 mm; polyurethane sponge is sliced from 5 mm to 200 mm. Thicker sections are built by laminating.
Related products
Let's find the right solution for your project — our technical team replies within 24 hours.
Request Quote