PASS 450 R Admixture is a superplasticizer based on polycarboxylate acid. Made with selected polymers, this product is formulated to provide excellent water reduction. which results in great ultimate final strength.improved workability, and enhanced durability. It also increases the concrete's ultimate strength and reduces its cement content while maintaining mechanical properties. PASS 450 R gives high slump increase with the same amount of water, and decrease the amount of water by (30-40 )% to cement ratio. PASS 450 R set retarding slump retention admixtures that enhance finish quality.