What makes EPS distinct
Expanded polystyrene (EPS) is a purpose-made material, engineered for reliable performance in insulation, protection, and form-stable design. Its properties remain stable over time and under pressure — delivering dependable results across construction, packaging, logistics, and infrastructure applications.
Composed of up to 98% air, EPS combines low material use with consistent technical function. It provides thermal control, compressive strength, and moisture resistance at low density — enabling carbon-efficient performance in both fixed systems and mobile uses.
Read more about how EPS is made here. EPS: Its history & manufacturing
Core functional properties
Lightweight structure, low material intensity
EPS delivers high function with minimal input. Its light weight reduces transport emissions, simplifies handling, and lowers raw material use — without compromising protective or structural performance. This supports energy and emissions targets across sectors.
Thermal conductivity and energy control
EPS provides dependable insulation with thermal conductivity values typically ranging from 0.031 to 0.038 W/m·K:
- Grey EPS (0.031–0.033): enhanced thermal control with graphite additive
- White EPS (~0.038): standard thermal performance for packaging and construction
These values allow for thinner assemblies and reliable temperature regulation — whether in residential facades or seafood logistics.
Compressive strength and mechanical stability
EPS can be produced with compressive strength from 100 to 250 kPa, with specialised grades reaching up to 700 kPa. This enables:
- Structural use in roads, foundations, and under-floor systems
- Protective use in packaging for large, delicate, or high-value items
Its strength-to-weight ratio allows EPS to serve both as a load-bearing material and a shock-absorbing buffer — supporting durability with material restraint.
Moisture resistance and dimensional integrity
Thanks to its closed-cell structure, EPS resists water absorption and microbial growth. It maintains its shape and insulation value even in wet or fluctuating environments — ideal for below-ground use, Nordic climates, and reusable cold chain packaging.
Safety and regulatory compliance
EPS is chemically inert, odourless, and approved for direct food contact in both the EU and US. It is widely used to protect:
- Fresh produce and seafood
- Temperature-sensitive pharmaceuticals and vaccines
- Medical equipment and human organs for transplant
Its hygiene and compliance characteristics make it suitable for high-trust and regulated sectors.
Custom formability
EPS can be moulded to precise dimensions and density specifications — supporting:
- Product-specific packaging
- Modular components in buildings and infrastructure
- Lightweight cores in helmets and safety inserts
Its formability enables design integration without compromising mechanical performance.
Fully compatible with fire-safe construction
EPS is used in certified fire-safe assemblies for facades, roofing, and floors throughout the EU and Nordic markets. It contributes to thermal performance in regulated systems that meet national fire codes and CE marking requirements. EPS is not used alone, but as part of multilayer building elements — tested and approved for safe use in residential, commercial, and industrial settings.
Recyclability and recovery pathways
EPS is 100% recyclable and recovered at scale in both commercial and consumer systems. Recycled EPS is used in:
- New moulded EPS products
- Extruded XPS insulation boards
- General-purpose polystyrene applications (non-food contact)
EPS is included in construction site recovery, industrial return loops, and dedicated collection schemes for packaging. Its circular role is recognised in independent reviews, including the UNEP Plastic Pollution Science Document, which classifies EPS transport packaging as “recycled at scale and in practice.”
Read more here: Circularity, reuse, and recovery
Lifecycle performance and climate value
Although derived from hydrocarbons, EPS requires very little fossil input. Its energy payback is rapid: the energy saved through use in insulation or temperature control often exceeds the energy used to produce it many times over.
Independent lifecycle assessments show that EPS delivers strong climate value relative to its embodied carbon — especially when installed in systems with long in-use phases, such as buildings or logistics networks. This makes it an efficient choice for reducing emissions at scale.
Read more here: Climate impact in context