Argos 4625079 EcoStrong Portland Limestone Cement Type IL 94 lb. Imagine every project that you can build for your customers— Argos portland limestone cement PLC Type IL is a high-quality blended hydraulic cement for sustainable building, that also provides a typical 10% carbon footprint reduction. Make your customers’ dreams a reality using PLC cement for a sustainable and more environmentally friendly building solution. Argos PLC is more eco-friendly product when used as a one-to-one substitution for portland Type I/II cement, with similar performance. PLC Type IL is ideal for use in ready-mixed concrete, precast and concrete products, bridge decks, grouts, soil stabilization, full depth reclamation (FDR), concrete masonry units, and other applications.