From bottle to stone. recyclable engineered stone for countertops.
SUSTONABLE is a revolutionary thin and ultra-lightweight building material developed and patented by INNSTECH, with the physical look and feel of engineered (quartz) stone. The product has a high scratch and impact resistance. The end product weighs 1/3 of current engineered stone while using only 20% of the raw materials.
In recent 30 years composite stone has been replacing natural stone in the kitchen. Artificial stone is a factory-made alternative with all the beauty of the natural material and the added benefits of resistance to staining, consistent colour, ease of handling and cutting. It is a fast-growing segment with 400M m2 countertops sold and will continue to gain share from less desirable materials such as HP Laminate worktops, which still represent 50% of the market as the cheapest option.
We at INNSTECH have pioneered the way to use recycled PET from plastic bottles and create a thin composite stone-like material that is recyclable with a very efficient process, and still having the desired look, feel and properties of current composite stone.  Moreover, we can drastically reduce SUSTONABLE price than comparable materials in the market -up to 50% cheaper than top vendor engineered stone, e.g. Silestone with sales €548M/yr.
Our vision is to deliver the next generation stone surface materials ready for the new sustainable circular economy, while positioning SUSTONABLE in the low-cost segment of the market offering the high-quality functional properties of competitors.
Having already successfully run our process in a pilot plant, SUSTONABLE has produced approximately 450 slabs of 250x80cm. The business strategy is first to prove the technology in the kitchen market by building and operating a medium scale plant with a capacity of 400,000 m2/year, reaching €12.6 million revenues in 2024.
The kitchen countertop leader in NL, Dekker (3500 countertops per week), has signed up as a co-investor in the project with the intention to sell and install SUSTONAB