Sapindus rarakSapindus rarak is a species of soapberry. It is a deciduous tree up to tall native to south and east Asia. Its species name is derived from the Malaysian name rerak or rerek. In Indonesia it is commonly known as lerak or klerek.DescriptionSapindus rarak trees can reach height of and a diameter of. Its compound leaves are large, up to long.UseSapindus rarak is a timber tree but the wood is not durable. Its fruits and seeds are used as buttons and beads. In Indonesia, the fruit are used to make a traditional soap for washing clothes, especially batik. Unlike many commercial detergents, it does not cause the colours to fade.