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Gard(M)

DESCRIPTION:

AT-GARD (M) is an elastic liquid applied, crack bridging 2-pack acrylic polymer modified cementitious waterproofing coating system

STANDARDS:

Conforms to IS 2625, IS 101 and ASTM D-2370

USES:

  • AT-GARD (M) is used as a seamless, impervious coating on flat roof for both exposed and concealed waterproofing applications
  • Basements, water retaining structures, underground concrete structures, pits, basins, sumps etc

CHARACTERISTICS:

  • Crack-bridging
  • Elastic
  • Good impermeability against water ingress

PRODUCT DATA:

COLOUR
  • Part A : White Liquid
  • Part B : Grey Powder
  • Primer : White Liquid
PACKAGING
  • Part A : 20 kg HDPE container
  • Part B : 30 kg HDPE container
  • Primer : 5 kg HDPE container
STORAGE
  • 6 months from date of production if stored properly in undamaged and unopened original sealed packaging in dry and cool conditions.
  • Liquid component must be protected from frost.

TECHNICAL DATA:

CHEMICAL BASE
  • Part A: Acrylic Copolymer
  • Part B: Specially graded cementitious powder
DENSITY 1.6 kg/l (mixed density) at +27ºC
LAYER THICKNESS 1 mm with FABRIC MESH

MECHANICAL / PHYSICAL PROPERTIES:

TENSILE STRENGTH ~2 N/mm² after 28 days (with FABRIC MESH) (According to ASTM D 2370)
PULLOUT BOND STRENGTH ~2 N/mm² (concrete failure) (According to ISO 4624)
SLANT-SHEAR BOND STRENGTH ~4 N/mm² (According to FIP 5.15)
ELONGATION AT BREAK ~35% without FABRIC MESH and 20% with FABRIC MESH (According to ASTM D 2370)
WORKABLE TIME ~30 minutes at +27ºC
WATER PERMEABILITY Passes (According to IS 2645)
WATER ABSORPTION Negligible
ACCELERATED WEATHERING, 500 HOURS No Chalking or cracking on the film (According to IS 101)

SYSTEM INFORMATION: EXPOSED ROOFING-SYSTEM

SYSTEM STRUCTURE Exposed Roofing-System Layer thickness: 1.5 mm
PRIMER 1 x AT-GARD PRIMER
BASE COATING 1 x AT-GARD (M)
FABRIC REINFORCEMENT 1 x FABRIC MESH
TOP COAT 1 x AT-GARD (M)

SYSTEM INFORMATION: CONCEALED ROOFING-SYSTEM

SYSTEM STRUCTURE Exposed Roofing-System Layer thickness: 1.5 mm
PRIMER 1 x AT-GARD PRIMER
BASE COATING 1 x AT-GARD (M)
FABRIC REINFORCEMENT 1 x FABRIC MESH
TOP COAT 1 x AT-GARD (M)

 

APPLICATION DETAILS:

  • CONSUMPTION / DOSAGE
    • AT-GARD (M) Primer : ~0.20 kg/m²
    • AT-GARD (M) : 1st coat = 0.70 kg/m², 2nd coat = 1.50 kg/m²
    • The consumption will increase for uneven / absorptive surface
  • SUBSTRATE QUALITY
    • The substrate must be structurally sound and free of all traces of contaminants, loose and friable particles, cement laitance, oils and grease etc.
    • The concrete “pull off” (tensile adhesive) strength must be > 1.0 N/mm²
  • SUBSTRATE PREPARATION : GENERAL
    • The substrate must be prepared by suitable mechanical preparation techniques such as high pressure water jetting, needle guns, blast cleaning etc. and properly pre-wetted to a saturated surface dry (SSD) condition.
    • For pore / blowhole filling:
      • Blast clean to remove all contaminants within the pores / blowholes.
  • APPLICATION CONDITIONS / LIMITATIONS
    • Substrate Temperature +10°C min. / +40°C max
    • Ambient Temperature +10°C min. / +40°C max
    • APPLICATION INSTRUCTIONS
      • MIXING USED AS SLURRY
        • Part A : Part B = 1 : 1.5 (by weight)
      • MIXING TIME/ TOOLS
        • The consistency of the mix can be altered by reducing the amount of Component A (liquid) to be used.
        • Under normal circumstances, when the full quantities of both components are mixed together, a slurry consistency will result.
        • For a trowel-able consistency use only 90% of component A. Mix in a clean container by slowly adding the powder component to the liquid component and stirring with slow speed mixer (500 – 600 rpm). Mix for 3 minutes until free from lumps
      • APPLICATION METHOD / TOOLS
        • Dampen all surfaces immediately ahead of AT-GARD (M) application.
        • Whilst the surface is still damp from saturation, apply the first coat and leave to harden (2-6 hrs.).
        • For slurry consistency apply with a hard plastic bristled brush or broom.
        • For trowel-able mortars use a notched trowel. After the second coat has been applied, finish by rubbing down with a soft, dry sponge.
      • AS SLURRY:
        • Apply the mixed AT-GARD (M) either mechanically, by spray or by hand using a stiff brush. Applied in the same direction.
        • Apply the 2nd coat of AT-GARD (M), applied by brush in crosswise direction to the first application as soon as first coat has hardened.

      APPLICATION DETAILS:

      • CLEANING OF TOOLS
        • Clean all tools and application equipment with clean water immediately after use.
        • Hardened / cured material can only be removed mechanically
      • WAITING TIME / OVERCOATING
        • Waiting time between coats +30°C ~5 hours waiting time period exceeds 24 hours, lightly clean the surface.
      • NOTES ON APPLICATION / LIMITATIONS CURING DETAILS
        • CURING TREATMENT: It is essential to cure AT-GARD (M) immediately after application for a minimum of 3 to 5 days to ensure full cement hydration and to minimise cracking.

      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.