Our products are cement-based although we use many different materials for supplementary parts ( wood and steel among others). Glass Fiber Concrete (GRC or GFRC) and High-performance Concrete (HPC or UHPC) main ingredients are Portland cement, graded silica sand, pozzolans , alkali resistant glass fibers and high quality polymers and chemical admixtures to enhance workability and boost chemical resistance and physical properties. Rammed Earth is also cement-based. We use a small amount of Portland cement to further stabilize walls and panels exposed to weathering and rain. A special blend of soils and pozzolans complement this ancient recipe.