Expanded granulated cork for acoustic and thermal insulation 2-9mm - 2000l (2 m3) - 140kg

The available fractions are 2–4 mm, 2–9 mm, 4–8 mm, and 3–15 mm.

Expanded cork granules are tiny, lightweight pieces of cork that offer superior insulation compared to regular cork. They’re made by applying high heat to cork oak bark, causing it to expand and darken. No chemicals or synthetic agents—just pure thermal expansion. The magic lies in suberin, a natural resin that binds the granules together when heated.

Expanded cork is a popular choice in construction, and is commonly used for:

• Insulating attics, floors, ceilings, and walls—especially in tight or irregular spaces,
• Filling wall cavities and gaps in insulation systems,
• Roof insulation—poured between rafters in pitched roofs,
• Under-floor fill or structural voids,
• Leveling uneven floor or ceiling areas,
• Dry fill insulation methods,
• Creating lightweight subfloor layers.

Beyond buildings, cork is also used in:

• Terrariums—for safe, breathable bedding for reptiles and exotic pets,
• Landscaping—as mulch or decorative top layer instead of pine bark,
• Film sets—for simulating soil, rubble, or rocky terrain,
• Model making—ideal for detailed scenery or dioramas.

It’s known for its excellent insulation. Expanded cork reduces heat transfer and sound better than traditional cork. But there’s more to love:

• Lightweight—won’t stress your structure,
• Naturally mold, insect, and fungus resistant,
• Chemically inert—safe around other materials,
• Shape-holding for decades,
• Long service life,
• 100% biodegradable and eco-responsible,
• Withstands extreme temps—from –180°F to 248°F,
• Fire-safe (Euroclass E)—no toxic gas emissions during combustion.

Absolutely. These granules are certified by the Polish National Institute of Public Health. They’re hypoallergenic, non-irritating, and safe to use. In fact, we’re the only company in Poland to hold this certification right now.

Without a doubt. Cork is harvested from the bark of cork oak trees—no tree felling involved. The bark regenerates every 9–12 years, and the trees themselves can live well over 200 years.

Even better, cork has a carbon-negative footprint. Cork oaks can absorb up to four times more CO₂ than most tree species.

Expanded cork offers long-term performance for up to 50 years or more without losing its properties.

It has a rich, natural dark brown color created by thermal expansion. There’s no artificial coloring added.

For granules between 2–9 mm, the density averages around 70–80 kg/m³.

Yes, expanded cork sheets are also available.

Cork beats foam in the long run. Foam is synthetic, can degrade over time, and often has a bigger environmental toll. It can shrink, crack, or break its seal.

Meanwhile, cork offers:

• Superior durability,
• Completely safe and natural composition,
• Resilience to mold and pests,
• Biodegradability and CO₂ absorption.

Store in a dry, ventilated space. Avoid damp basements or outdoor plastic covers. Keep it away from heat sources or direct sun exposure.

Best practice: keep it dry, well-aired, and away from direct heat or moisture.