The timber is a Medium Hardwood with a density of 640-975 kg/m3 air dry. Kulim is classified as moderately durable
The Standard Malaysian Name for the timber ofScorodocarpus borneensis (Olacaceae). Vernacular names applied include bawang hutan (Sabah and Sarawak) and ungsunah (Sarawak). This is a monotypic timber. The sapwood is light yellow in colour and is moderately sharply differentiated from the heartwood, which is dark purple-brown to dark red-brown.
Also known as Bawan, Kasino, Kayu bawang, Kulim, Madudu and Sinduk(Indonesia); Krathiam ton, Kuleng and Kulim (Thailand).
AIR DRYING
The timber seasons fairly rapidly, with moderate end-checking and splitting and slight surface-checking as the main sources of degrade. 13 mm thick boards take 2 months to air dry, while 38 mm thick boards take 4 months.
SHRINKAGE
Shrinkage is fairly high, with radial shrinkage averaging 1.7% and tangential shrinkage averaging 3.2%.
