NSL Ltd. is an investment holding company, which engages in the design, supply, and delivery of precast concrete components and prefabricated bathroom units (PBU) and provides environmental services. It operates through the following segments: Precast and PBU, Environmental Services, Chemicals, and Investment Holding and Others. The Precast and PBU segment deals with the manufacture of precast concrete components in Singapore, Malaysia, and Dubai; and PBU production in Scandinavia. The Environmental Services segment engages in oil and chemical waste management and the distribution and supply of diesel, fuel oil, marine gas oil, lubricants and fuel management technology. The Investment Holding and Others segment includes the group's assets, composed mainly of holding investments. The company was founded on August 12, 1961 and is headquartered in Singapore.