MasterSet R 300 set retarding admixture

Formerly: Pozzolith 300 R

MasterSet R 300 description:

MasterSet R 300 ready-to-use liquid admixture is used for making more uniform and predictable high-performance concrete while retarding its setting time to facilitate placing and finishing operations.

Recommended uses:

  • Prestressed concrete
  • Precast concrete
  • Reinforced concrete
  • Shotcrete
  • Lightweight concrete
  • Pumped concrete
  • 4x4 Concrete
  • Pervious concrete
  • Self-consolidating concrete (SCC)

What are the unique features of MasterSet R 300?

  • Reduced water content required for a given workability
  • Retarded setting characteristics
  • Improved workability
  • Reduced segregation
  • Superior finishing characteristics for flatwork and cast surfaces
  • Moderate to extended retardation – depending on the dosage rate
  • Full-form deflection can take place (before concrete sets) in extended pours for bridge decks, cantilevers, non-shored structural elements, etc
  • Meets ASTM C 494/C 494M requirements for Type B, retarding, and Type D, water-reducing and retarding, admixtures

What are the benefits of MasterSet R 300?

  • Flexibility in scheduling of placing and finishing operations
  • Offsets effects of early concrete hardening during extended delays between mixing and placing
  • Helps eliminate cold joints
  • Peak temperature and/or rate of temperature rise in mass concrete lowered thereby reducing thermal cracking
  • Increased compressive and flexural strengths

US / Canada Product Information

Data Sheet

Direct contact

Master Builders Solutions Technical Support

Admixture Systems


Safety Data Sheet (SDS)

Find all available safety data sheets for this product.

Product Certifications

Generate a free certificate of conformance for a specific BASF construction product.

Related Literature


pdf (183.31 Kb)


pdf (198.51 Kb)


pdf (256.03 Kb)

MasterSet R 300 Data Sheet

pdf (61.22 Kb)

MasterSet R 300 SDS

pdf (267.42 Kb)