For over two decades, the company’s sole business was tin mining. It was the first Malaysian company to construct and operate a dredge. It operated two dredges in Dengkil, Selangor and the second dredge, constructed in 1971 was the largest and most advanced dredge in the world.

In the early 1980s, Selangor Dredging began to put in motion a plan for diversification. This led to the company’s involvement in various activities including hardware manufacturing and retail manufacturing of tyre rims.