The final quality of EPS Cement Sandwich Wall Panel is heavily dependent on the quality of every single raw material used during the production process and top manufacturers maintain very strict standards for all incoming ingredients. The cement used for EPS Cement Sandwich Wall Panel production must be high strength low alkali Portland cement with a strength grade no less than 42.5 to prevent later surface efflorescence issues and ensure long term structural strength. The EPS foam core inside high quality EPS Cement Sandwich Wall Panel must be made from brand new virgin flame retardant EPS beads instead of cheap recycled EPS material which guarantees that the core maintains its full insulation performance for more than 50 years without any performance degradation. The alkali resistant fiberglass mesh embedded inside the cement shell of EPS Cement Sandwich Wall Panel must have an alkali retention rate above 90 percent to make sure the anti crack reinforcement remains effective even after decades inside the alkaline cement environment. High quality EPS Cement Sandwich Wall Panel manufacturers also add a small amount of high performance polypropylene micro fibers into the cement mix to further improve the impact resistance and anti cracking performance of the panel surface. By controlling every single raw material input at the highest possible standard manufacturers can produce EPS Cement Sandwich Wall Panel products that deliver consistent reliable performance across all completed projects.