Crystal A-20

DESCRIPTION:

AT-CRYSTAL A-20 is a ready to use cement based powder capillary waterproofing system for concrete and mortar to prevent water infiltration or seepage of water in the area of low pressure of concrete structure or any cementitious substrate.

USES:

• AT-CRYSTAL A-20 forms slurry consistency when mixed with water. When it is applied to the concrete substrate it forms insoluble crystals inside water bearing capillaries and seal against further seepage of water. AT-CRYSTAL A-20 blocks the pores in concrete structures such as :
  • Basement
  • Reservoirs
  • Sewage water and effluent treatment plant
  • Tunnel and underground subways
  • Foundations
  • Swimming pools
  • Underground parking structures
  • Water tanks

CHARACTERISTICS & ADVANTAGES:

• AT-CRYSTAL A-20 provides the following beneficial properties in post applied waterproofing
  • Easy to apply
  • Can be used for positive and negative side waterproofing
  • Helps in faster construction schedule
  • Can seal hairline cracks
  • Becomes an integral and homogenous part of the structure
  • Allows the substrate to breath
    • No added chloride
    • Non-toxic

PRODUCT DATA

TECHNICAL DATA

MECHANICAL / PHYSICAL PROPERTIES

APPLICATION DETAILS:

• CONSUMPTON / DOSAGE
  • ~ 1.2 kg/m2 per coat. Two coats always recommended
  • ~1.8 kg/m2 as a dry shake
  • ~0.8% by weight of cement as an additive to concrete

• SUBSTRATE QUALITY
  • Concrete surface must be clean, sound, level and uncontaminated by oil or grease

• SUBSTRATE PREPARATION
  • Remove cement laitance, formwork-traces and loosely adhering particles by mechanical means
  • Area of honeycomb concrete and other surface imperfections must be repaired with cement sand mortar
  • De bonding render must be removed
  • Wet surface until saturated

• MIXING
  • Add powder to given amount of water and stir with low speed mixer for 5 minutes until a lump free smooth brushable consistency is achieved

• APPLICATION MENTHOD / TOOLS
  • During application of AT-CRYSTAL A-20 add a liquid applied polymer modified flexible coating system with crystallisation properties. The following procedure shall be adapted for application :
    • For the 1st Coat of AT-CRYSTAL A-20 is mixed with water to produce crystalline slurry and to be coated with the help of a brush or roller
    • When the first coat is in tacky condition AT-CRYSTAL A-20 is mixed with water to produce crystalline slurry and to be coated with the help of a brush or roller
    • AT-CRYSTAL A-20 also has multiple application as
      • Dry shake over freshly laid PCC ( no waiting time required after PCC for waterproofing)
      • As a waterproofing additive to the concrete

• NOTES ON APPLICATION / LIMITATION
  • AT-CRYSTAL A-20 must be prevented from drying out too rapidly. The freshly applied surface must be protected from rain, strong winds and direct sunshine. Keep moist using damp hessian and covering with polythene sheet for first 3-4 days after application. Protect slurry in pedestrian areas overlaying with 1:3 cement sand screed.

• CLEANING OF TOOLS
  • Clean all tools and application equipment with clean water immediately after use
  • Hardened / cured material can only be removed mechanically

• VALUE BASE
  • All technical data stated in this Product Data Sheet are based on laboratory tests
  • Actual measured data may vary due to circumstances beyond our control

HEALTH & SAFETY:

• Protect hands with rubber gloves and eyes with goggles.
• Accidental splashes to the skin or eyes must be rinsed immediately with clean water.
• Store in well-labeled containers.