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.
