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    ​​​​Master X-Seed 66​

    Water-Reducing and Strength-Enhancing Admixture​

    ​Master X-Seed 66®​​ is a patented​, waterreducing a​nd strength-enhancing admixture that improves both early- and late-age strength development in concrete, while supporting sustainable construction. Master X-Seed 66 admixture is based on a unique technology that facilitates improved cement hydration, thus enhancing strength development. It includes polycarboxylate technology that helps produce concrete mixtures with different levels of workability. Master X-Seed 66 admixture meets ASTM C494/C494M requirements for Type A, water-reducing, admixtures. 

    The strength-enhancing property of Master X-Seed 66 admixture permits a reduction in the total cementitious materials content of a given concrete mixture while maintaining compressive strength development equivalent to that of reference concrete, with associated benefits in CO2​​ emissions reduction.

    Recommended Uses of Master X-Seed 66:

    • Green Sense® concrete
    • Ready-mixed concrete
    • Prestressed concrete
    • Precast concrete
    • Self-consolidating concrete (SCC)

    ​What Are the Features of Master X-Seed 66 Strength-Enhancing Admixture?

    • Improves cement hydration
    • Increases strength development — both early- (1-day) and late-age (28-day)
    • Reduced water content for a given workability​

    What Are the Unique Benefits of Master X-Seed 66 Strength-Enhancing A​dmixture?

    • Improved workability
    • Provides a strength safety factor and/or expanded performance space
    • Reduces in-place concrete costs when utilized in optimized concrete mixtures
    • Permits higher replacement levels of supplementary cementitious materials (SCMs)
    • Permits earlier stripping and reuse of forms
    • Helps reduce CO​2 emissions associated with concrete​​​​

    Direct contact

    Master Builders Solutions Technical Support

    Admixture Systems

    1-800-628-9990

    Safety Data Sheet (SDS)

    Find all available safety data sheets for this product.

    Product Certifications

    Generate a free certificate of conformance for a specific Master Builders Solutions construction product.

    Related Literature

    Master X-Seed 66 Data Sheet

    pdf (220.81 Kb)

    Master X-Seed 66 Data Sheet (French)

    pdf (210.97 Kb)

    Master X-Seed 66 Overview Brochure

    pdf (994.86 Kb)

    Master X-Seed 66 Overview Brochure (French)

    pdf (3.50 Mb)