3-in-1 protection: thermal, acoustic & vibration control
All-natural product
Durable, long-lasting & dependable
Cost-efficient
Versatile insulation solution
Safe to use
You probably have a few questions — let’s break it down for you.
WHAT IS EXPANDED CORK?
Expanded cork is natural cork that's been thermally treated. The heating process triggers expansion and releases suberin – a natural binder that fuses the granules and increases their volume, similar to how popcorn pops! This process gives expanded cork its signature dark brown color and superior insulating properties that enhance thermal resistance.
IS HD CORK A BETTER INSULATOR THAN OTHER MATERIALS?
High-density expanded cork sets itself apart from standard insulators like mineral wool, EPS, or spray foam, offering better thermal protection and indoor air quality.
Mineral wool may cause skin, eye, and respiratory irritation, and it’s prone to moisture absorption, which compromises performance and promotes mold growth. Expanded cork, on the other hand, is hypoallergenic, safe for skin contact, emits no VOCs, resists moisture, and prevents mold buildup naturally.
Polystyrene lacks durability under mechanical stress and performs poorly in high-heat environments. It’s also a challenge to recycle. In contrast, expanded cork is incredibly resilient — with high compression resistance, long-term thermal stability, and outstanding weather tolerance. It’s also easy to recycle, making it one of the greenest insulation options available.
Polyurethane foam can release toxic substances, especially when exposed to fire, and requires specialized tools for installation, which raises labor costs. Expanded cork is fire-safe, emits no toxic fumes, and installs easily using basic tools — making it an economical and reliable insulation solution.
HOW DOES STANDARD CORK COMPARE TO HD CORK?
HD expanded cork boasts a density of 170–190 kg/m³, whereas standard cork panels range between 110–120 kg/m³. That higher density means better acoustic performance, greater thermal efficiency, and enhanced vibration absorption — making HD cork ideal for high-performance insulation projects.
WHERE CAN HD CORK BE USED?
HD cork is perfect for sound-sensitive environments — use it to insulate machinery, appliances, rooms, refrigeration units, and ductwork. It’s also great for music studios, performance halls, schools, offices, commercial buildings, industrial plants, workshops, yoga spaces, gyms, hotels, and resorts.
It also excels at wall, floor, and ceiling insulation in residential, construction, and passive building projects. Expanded cork is especially effective on flat roofs, pitched roofs, and green roofs, offering lasting and efficient thermal control.
SHOULD I LET THE CORK ADJUST TO ROOM CONDITIONS BEFORE INSTALLATION?
Yes, you should. Allow the expanded cork to acclimate for about 72 hours in the room where it will be installed. This helps the material adapt to temperature and humidity, reducing the risk of warping, cracking, or adhesion issues — ensuring optimal performance.
WHAT SHOULD I DO BEFORE INSTALLING HD CORK?
Before installation, make sure the surface is clean and dry. Skipping this step could lead to cork detachment, uneven surfaces, or cracks — all of which reduce performance and may require costly repairs. Prepping the surface thoroughly is key to getting the best results from your cork insulation.
WHAT TOOLS DO I NEED TO INSTALL EXPANDED CORK?
You don’t need any fancy equipment to install cork. Just grab a measuring tape or ruler, a sharp utility knife, a spatula or roller, and a high-quality cork adhesive like Wakol D-3540. For ceiling applications, consider using anchors along with adhesive for added support.
HOW MUCH ADHESIVE DO I NEED?
You’ll need around 100 grams of adhesive per cork panel. A 0.8 kg tub should be enough for 8 panels, while a 2.5 kg bucket will cover up to 25 panels.
The typical coverage rate for Wakol D-3540 adhesive is 150–250 g/m². That means 0.8 kg covers about 4 m², and 2.5 kg covers around 12.5 m² of surface area.
WHAT TEMPERATURE RANGE CAN HD CORK HANDLE?
Expanded cork handles extreme temperatures like a champ — from -180°C to +120°C. It retains its mechanical strength and insulating properties across that full range, making it perfect for demanding environments.
Exploring insulation options and wondering what makes expanded cork stand out? The answer is simple — it’s eco-friendly, built to last, and offers all-around protection.
By choosing cork, you’re not just getting reliable thermal, sound, and vibration insulation — you’re also investing in long-term peace of mind and dependable performance.
#1 MULTI-LAYERED INSULATION FOR DECADES OF COMFORT
If you’re looking for insulation that won’t need replacing in a few years, expanded cork is your go-to solution. Unlike foam or polystyrene, cork stands the test of time with exceptional durability and zero compromises on performance.
This natural thermal barrier not only helps regulate indoor temperatures but also blocks out disruptive noise. With higher density variants, cork panels efficiently absorb vibrations and noise from heavy machinery or industrial environments.
#2 SUSTAINABLE HARVESTING & NATURAL CARBON CAPTURE
Before cork gets turned into insulation panels, it begins its journey in Portugal, where it’s harvested in a time-honored way by skilled artisans. Using traditional tools, they carefully strip the bark from cork oak trees — a practice passed down for generations that leaves the tree unharmed. The bark regenerates every 9–12 years and during this time, absorbs up to five times more CO₂ than usual, making cork a renewable, carbon-negative material.
Expanded cork is not only 100% biodegradable but also recyclable — which means it can be reused in new cork-based products, reducing waste and encouraging circular production cycles.
#3 ENERGY SAVINGS THAT ADD UP YEAR AFTER YEAR
Expanded cork panels help factories, warehouses, and commercial spaces maintain a steady indoor climate, which directly translates into reduced heating and cooling bills.
Thanks to its natural insulating power, cork keeps warmth inside during the winter and deflects heat during the summer. That means less energy spent on HVAC systems — and more savings in the long run.
#4 LONG-LASTING, HIGH-PERFORMANCE MATERIAL THAT WON’T QUIT
Expanded cork with high density boasts impressive resistance to aging, pests, and rodents. It retains its structural integrity and insulation properties for up to 50 years — without losing effectiveness.
Even after decades, cork continues to perform. Unlike foam or polystyrene, which often need early replacement, cork’s stability and longevity make it a cost-effective and low-maintenance alternative.
What’s more, cork offers excellent compression resistance and natural protection against moisture. Its high suberin content makes it naturally antibacterial and mold-resistant, keeping interiors safe and clean from harmful microbes.
| Format | Board |
| Color | Dark brown |
| Length | 1000 mm |
| Width | 500 mm |
| Thickness | 20 mm |
| Installation | Glue |
| Material | Expanded cork (HD) |
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