#02 \PORTLAND Dura-flex Water Soluble Polymer Powder for polymer modify Cement mortars & Concretes to increase Flexural, Shear, & Tensile Strengths, Elasticity, Blending, Toughness, Creep Resistance, Inter-Bond Cohesion, Impact Absorption, Elongation to Break for Last Long Durability Earth - Quake Absorber ConcretesCombine Strength + Dura-flex = High Strengths & Durable Concretes.Specification: Comply with ASTM C 494 Chemical Admixtures for Concrete type S Specific Performance Admixtures (Flexural Strength), ASTM C 1438 Latex & Powder Polymer Modifiers in Hydraulic Cement Concretes & Mortar