When choosing the right foam for a project, the differences between materials matters more than you think.

Two of the most commonly compared foams on the market are IXPE foam sheets and EVA foam sheets. Both are lightweight, versatile and widely used across many different industries. However, they may look the same on the outside, underneath they perform quite differently. 

You may be looking to protect products in transit, or you’re looking for cushioning, perhaps you’re wanting durability and chemical resistance. Whatever the circumstances,knowing which foam to use for what application can save you time and money.

In this guide, we’re going to put IXPE and EVA side by side, comparing their properties, performances and ideal work cases. This will allow you to be informed and make the right choice when choosing a foam for your projects.

What Is IXPE Foam and How Is It Made?

Irradiated Cross-Linked Polyethylene (IXPE) is a closed-cell polyolefin foam known for its solid shock absorption, thermal insulation and moisture resistance. It is widely used as an acoustic underlayer in flooring and automotive interiors.

There is a 5-step process to produce IXPE Foam:

• Blending . Low-Density Polyethylene (LDPE) is mixed with chemical foaming agents and other additives to create a uniform masterbatch.
• Extrusion . This mixture is melted and extruded through a machine to create a smooth, solid sheet.
• Irradiation . This sheet is passed under an industrial electron accelerator. This alters the polymer chains to link them in a tight, three-dimensional network. This increases the foam’s strength, elasticity and heat resistance.
• Foaming . The now irradiated sheet is passed through a high-temperature furnace. This activates the foaming agent and makes the sheet expand up to 40 times its original size.
• Cooling and Shaping . Once the sheet has cooled down, it is wound into continuous rolls or sheets of IXPE foam.

IXPE foam has excellent shock and sound dampening qualities. The cross-linking structure is an excellent cushion absorbing heavy impacts. It also reduces airborne noises, hence it is used under flooring in apartments daily often.

The closed cell technology makes IXPE foam sheets excellent thermal insulation, with virtually no vapour permeability. They are also highly resistant to chemicals, moisture and extreme temperatures. This makes them ideal for demanding, industrial environments. 

What Is EVA Foam and Where Is It Used?

Ethylene-Vinyl Acetate (EVA) foam is a dense, rubber-like closed-cell foam highly sought after due to it being so light weight, great at shock absorption and water resistance.

Much like IXPE foam, it has a multi-step creation process:

• Polymerisation . Ethylene and vinyl acetate are copolymerised under high pressure to create raw EVA resin.
• Compounding . The EVA pellets are mixed with additives, including foaming/blowing agents, which create the gas that causes expansion, cross-linking agents, colour pigments and a varying range of plasticisers and fillers to adjust the flexibility and density of the final product.
• Melting and Mixing . This blended mixture is fed into a mixer where heat and friction melt the ingredients into a molten state.
• Foaming and Expansion . This hot material is then moved into a machine where foaming occurs. There are two ways to do this:
• Compression Molding . The molten mixture is poured into a preheated mold and held under extreme pressure. When the mold is suddenly opened, the pressure drops, allowing the blowing agents to expand and turn it into a foam.
• Extrusion Foaming . The molten mixture is fed through a specialised nozzle. This drops the material to atmospheric pressure and it instantly expands into a continuous foam sheet.
• Cooling and Cutting . When the foam has reached its final form it is cooled to set into a shape and texture. It is then sliced or cut into specific thicknesses and shapes.

EVA foam is used in many everyday items, such as the shock absorbing soles in sporting footwear or protective padding in helmets, knee pads and suchlike. You will find EVA foam in those interlocking mats and flooring at gyms which help absorb impacts when people fall off gym equipment.

You will also find EVA foam in cosplay outfits. Because EVA foam is easy to cut and sand and mould with heat guns, this foam works well in creating replica armour and weapons for the adventurous.

IXPE Sheet vs. EVA Foam: Key Differences at a Glance

WHile both types of foam are a closed-cell foam, there are enough differences between the two types for some distinct uses. Here is a table to give you a quick comparison of the two foam types:

Which Industries Use IXPE Foam Sheets and Which Prefer EVA?

WIth its superior structural strength, great resistance to chemicals and acoustic properties, IXPE is most commonly found in these industries:

• Building and Construction . Acoustic underlays for laminate, hardwood and luxury vinyl tile floors, and wall panel insulation.

• Automotive . Vibration dampening, acoustic soundproofing, interior gaskets and HVAC duct insulation.

• HVAC and Industrial . Used to insulate vents and ducts. With close to zero vapour permeability and great heat resistance, IXPE is perfect for heavy industries.

• Medical and Orthotics . For applications that need a non-toxic and odourless, fine-celled structure for support and medical padding.

EVA behaves like rubber. As such it has different applications in various industries.

• Footwear and Orthotics . Used for midsoles and insoles and orthopedic inserts because of the long-term shock absorption.

• Sports & Leisure . Gym mats, yoga mats and padding for sporting protective gear.

• Packaging . Great for protecting fragile or high-value industrial equipment and sensitive electronics thanks to its ability to take repeated impacts.

When to Choose IXPE Foam

IXPE foam sheets are the stronger choice when performance under pressure matters. The combination of high density and fine closed-cell structure make it the industry standard for floating floor systems, such as SPC and laminate, delivering superior impact sound insulation that EVA simply cannot match in this application.

IXPE also has low thermal conductivity, making it ideal for projects that require temperature regulation in walls, floors and roofing.

When to Choose EVA Foam 

EVA works for you when you need flexibility, workability and value. The rubbery and elastic nature of EVA foam makes it a natural fit for gym mats and flooring where you want comfort and springyness, good for taking a hit, think martial arts or wrestling. For uses where high heat resistance and long-term structural load is not a requirement, then EVA foam makes a cost-effective solution. 

IXPE and EVA Foam Sheet Supplies in Australia — Why Choose MSTOR? 

Both IXPE foam sheets and EVA foam are capable, widely used materials, but they are built for different jobs. IXPE sheeting is the go-to when you need superior thermal insulation and structural performance under load. EVA foam is the practical choice when flexibility, ease of use, and cost-effectiveness are the priority. Knowing which one suits your project from the outset means less guesswork, fewer material changes, and better results for you.

At MSTOR, we supply both IXPE and EVA foam sheet supplies to customers across Australia, if you need single sheets or bulk quantities of either. If you are unsure which foam is right for your application, our team is happy to help you work it out. Browse our range online or get in touch with MSTOR today to find the right foam solution for your needs.