Natural rubber latex waste (WL) was treated with natural rubber latex (NRL) prior to blend with polystyrene. Different blend compositions of treated waste natural rubber latex (TWL) and PS were carried out through solution blending. Tensile and tear properties were investigated. The compatibility improvement of the 70/30 TWL/PS blends was further investigated using styrene butadiene rubber (SBR) and styrene graft natural rubber (SNR) as compatibilizer. The mechanical properties results