Ulin wood, or Eusideroxylon zwageri, is a remarkable and rare timber species native to Indonesia. Known for its exceptional durability, strength, and resistance to decay, ulin wood has a long history of use in construction and has earned a place in both traditional and modern applications.
Ulin wood boasts incredible density (± 900 to 1200 kg/m3) and durability, making it highly resilient against harsh weather conditions, pests, and fungi. It ranks among the densest woods globally, ensuring it can endure wear and
tear with ease
The heartwood of ulin wood is initially reddish-brown to almost black, darkening over time to reveal a lustrous, polished finish that is highly sought after in construction and design.
Ulin wood is commonly used in traditional construction like crafting longhouses, boats, bridges, and grave markers. Its strength and resilience are essential in environments with challenging conditions. It also has found a place in contemporary architecture, used for decking, flooring, furniture, and decorative elements. Its beauty and durability make it a sustainable choice for long-lasting structures.
Due to increasing demand, ulin wood is listed on the CITES Appendix II, regulating international trade to ensure sustainability. Conservation initiatives aim to protect ulin tree habitats, prevent illegal logging, and promote responsible harvesting. Ulin wood holds cultural significance in the regions where it grows. Indigenous communities rely on it for traditional dwellings and tools, reflecting the close connection between nature and culture.
STI also offers a range of similar woods, including merbau and yellow balau. These species share some characteristics with ulin wood and are used in various construction and design applications, providing alternatives for those seeking durable and beautiful timber. We make sure they come from legally harvested and sustainably managed forests through SVLK certification.
Ulin wood is a rare and enduring timber with a rich history and promising future. While its conservation remains a priority, responsible harvesting practices and the protection of its natural habitats are essential to preserve this exceptional resource.
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