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AquaShieldPro Smart CW 21

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Two- component, Acrylic reinforced cementitious, flexible waterproof coating for concrete and masonry

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SKU
ASPCW21
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m²
Product Pack Size Coverage Unit Total Requirement No of units Required
AquaShieldPro CW21 20 1.75 kg/m2
AquaShieldPro CW21 0.00
Price/Sqm

*This Coverage Is Theoretical & Depends Upon The Surface Profile Of The Substrate & The Wastage.
*Coverage Rates Given Refer To This Project Only.
*Wastage Of Material And Preparation Of Surface Not Included.

Product Pack Size Coverage Unit Total Requirement No of units Required
AquaShieldPro CW21 20 3.50 kg/m2
AquaShieldPro CW21 0.00
Price/Sqm

*This Coverage Is Theoretical & Depends Upon The Surface Profile Of The Substrate & The Wastage.
*Coverage Rates Given Refer To This Project Only.
*Wastage Of Material And Preparation Of Surface Not Included.

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DATA RESULT

Appearance		 Grey powder containing micro fine fibres
Mix Density approx. 2,195 kg/ m³
Working Time @ 25º C 60 min
Setting Time @ 25º C 90 min
Initial cure/ Light Foot Traffic approx. 24 hours @20º C approx. 18 hours @30º C
Maximum waiting time between coats approx. 36 hours @20º C approx. 15 hours @30º C
Full traffic use/ approx. 48 hours @20º C approx. 24 hours @30º C 7 days
Application temp. range From +5º C to +45º C
Max service temperature From -30º C to +60º C

Compressive Strength(ASTM C580)		 > 25 N/mm² (1 day)> 45 N/mm² (7 days)> 60 N/mm² (28 day
Flexural strength(ASTM C580) > N/mm² (1 day)> N/mm² (7 days)> N/mm² (28 days)
Tensile Strength(ASTM C580) > N/mm² (1 day)>  N/mm² (7 days)>  N/mm² (28 days)
Pull off strength (ASTM D4541) >1N/mm²
Water penetration (DIN 1048: Part 5) <5 mm
Water absorption <0.1%
VOC content 0 g/ liter

Note:

* All values given are subject to 5-10% tolerance

* At +23°C and 50% relative humidity. Higher temperatures reduce, and lower temperatures increase the times given.

* Properties listed above are only based on controlled laboratory samples and tests: Results may differ based upon statistical variations depending upon mixing methods and equipment, temperature, application methods, test methods, actual site conditions, and curing conditions.

®=Registered trademark of the North Group.

Description

AquaShieldPro CW 21 is a two-component acrylic modified cementitious coating consisting of a powder that is a blend of Portland cement, selected silica sands, and modifying agents. When mixed to a slurry consistency with AquaShieldPro CW 21 liquid, an acrylic polymer emulsion, it can be easily applied by brush, roller, or trowel. It cures to give a waterproof, elastomeric hard wearing, flexible membrane providing an effective barrier to water-borne salts and atmospheric gases and resurfacing concrete, masonry, and most other construction materials.

AquaShieldPro Smart CW 21 has excellent bonding properties to all concrete, masonry, ceramic, and marble surfaces, as long as they are sound and sufficiently clean. It must be reinforced with mesh across all construction joints and cracks. The reinforcing mesh may be 100% virgin polypropylene.

Additional Information

Applicable Standards/ Compliance: Packaging: Colours: Coverage/ Yield:
BS 6920: Part 1 2000 - Suitable for use in contact with potable water EN 1504-9 (“Products and systems for the protection and repair of concrete structures - Definitions, requirements, quality control and evaluation of conformity – General principles for the use of products and systems”) and the minimum requirements claimed by EN 1504-2 coating (C) according to the PI, MC and IR principles (“Protection systems for concrete surfaces”).    25 kg bags Grey
  • 1.5 kg (1 litre) / 1m² at 1mm thickness (2 layers recommended)
  • An additional 0.5kg/m² is required when embedding with approved mesh

* This coverage is theoretical & depends upon the surface profile of the substrate & the wastage 

Typical Applications

  • Suitable for internal and external use, against positive and negative water pressure.
  • For waterproofing of water-retaining structures which may be subject to movement.
  • For use in wet area waterproofing (under-tile) where tiles are to be installed directly on top of the membrane
  • As a vapor barrier, Damp proofing for facades.
  • For waterproofing swimming pools, pool surrounds, wet rooms, balconies, terraces, roof
  • As a waterproof coating behind tiles and stone to prevent staining
  • Flexible protection layer of new concrete structures or repaired structures subject to minor deformation under load.
  • Flexible waterproofing and protection of reinforced concrete structures against the effects of freeze-thaw and carbon dioxide attack to improve durability including tanks with drinking water, basins, pipes, etc.
  • As a waterproof and protective coating for concrete structures, renders, cementitious screeds
  • For coating seawater channels.
  • For waterproofing and protection against brackish and seawater
  • To provide foundation protection.
  • As a waterproof coating for roofs.
  • To provide protection to concrete surfaces from water, carbonation, chloride attack, and deicing salts.
  • For use on pedestrian walkways in marine areas.
  • As a waterproof and protection coating on top of spray polyurethane foam roof insulation.

Benefits

  • Breathable - whilst repelling water, allows the substrate to breathe
  • Approved for use in contact with potable water
  • Can be applied to 24-hour-old concrete thereby giving immediate protection
  • Excellent crack accommodation before and after immersion
  • Easily applied by brush, roller, trowel, or airless spray
  • Retains flexibility when submerged and freeze-thaw resistant
  • Withstands occasional foot traffic
  • Even if the membrane gets mechanically damaged, it can be easily repaired locally within minutes.
  • Outstanding wear and weather resistance and good resistance to seawater, sodium hydroxide, calcium chloride, and de-icing salts.
  • Good resistance to mild acids
  • Excellent adhesion. Bonds to porous and non-porous surfaces
  • Anti-carbonation coating
  • Environmentally friendly.
  • Long working life
  • Suitable for light pedestrian traffic
  • Unlike conventional coatings which require a 7–28-day cure of concrete, AquaShieldPro CW 21 can be applied to 24-hour-old concrete thereby giving immediate protection
  • Low odor, allowing installation in occupied buildings
  • Extremely low permeability - gives excellent resistance to attack by aggressive elements
  • Pre-bagged - only the site addition of clean water is required
Technical Data Sheet Download
Material Safety DataSheet Download
Substrate Preparation

The substrates must be sound, clean, dust free, and free from all traces of oil, grease, curing compound, gypsum, residual paint, corrosion deposits or algae, or laitance which would impair adhesion. Conventional concrete curing compounds should be removed before the application of the product. The exception to this is when BondPro Cure RB, a resin-based curing compound has been used. Cracks, voids, and honeycombs in concrete surfaces must be repaired with suitable repair products from the RepairPro product range.

 

All the patched areas to cure before applying the membrane. Clean surface by blast cleaning, high-pressure water jetting (400 bar), wire brushing, grinding, etc. in order to remove all previous coatings, any traces of grease, rust, release agents, cement laitance, and any other material which could reduce adhesion. All dust deposits from preparation must be removed by vacuum. The surface must be adequately dampened before application.

Product Preparation

The product is supplied in pre-measured units and should be mixed in clean containers. Slowly add the powder to the liquid and mix, using a slow-speed drill fitted with a suitable paddle until a uniform and lump-free consistency is achieved allow to stand for 5 minutes and re-mix, the paste is then ready to use. Do not mix more material than can be used in one hour. Do not prepare the mix by hand.

NOTE: Although the product is supplied in pre-measured packs, part packs can be used by mixing 2 volumes of powder with 1 volume of liquid. Mix thoroughly and keep mixed during application

Product Application

Saturate concrete surfaces with clean water whilst still visibly damp, but free of standing water, apply, using a short, stiff bristle brush or roller. Trowel application can be undertaken as necessary. For heavy 6-10 mm depressions, honeycombs, etc. use less gauging liquid and mix to the desired consistency. The first coat should be applied at a minimum thickness of 1mm (approximate coverage is 1.6kg/m²) and should be well brushed into the surface. Application may also be made by roller; however, it is recommended to finish the surface with a trowel for best results. It is recommended, for general resurfacing, that each coat should be a minimum of 1 mm thick. Wait until the first layer is dry before applying subsequent layers. Pre-dampening of the surface is not necessary when applying the second coat. The application shall cover the whole surface of the substrate in a uniform thickness.

 

Apply AquaSieldPro CW 21 by:

  • spatula/roller: Exerting good and even pressure onto the substrate.
  • brush: In 2 directions (diagonally opposite/crosswise).
  • mechanical spray: recommended for large areas

Curing and Protection:

In order to protect AquaShieldPro CW 21 against any damage caused by e.g backfilling or traffic, it must be protected using either a cementitious screed or protection boards. A separation sheet can be laid under the protection layer if necessary, to avoid any bonding to the membrane.

Tiling or finished flooring installations should be carried out as soon as possible after a full cure of the membrane is established. Under hot or excessive drying conditions adequate protective shielding should be foreseen.

 

In cold, humid, or unventilated areas it may be necessary to leave the application for a longer curing period. AquaShieldPro CW 21 needs to cure under dry-air conditions. Additional heating and/or ventilation can assist in proper curing. NEVER use dehumidifiers during curing periods.

Others
  • Protect from the rain at least 24-48 hours after application
  • Avoid application in direct sunlight and when rain is imminent or in strong winds, unless in a sheltered or protected situation.
  • Avoid direct contact with chlorinated water i.e., in swimming pools, by using suitable protection (e.g. tiles). If a solvent-based paint is to be applied on top, carry out preliminary testing in order to ensure that the solvents do not attack and damage the waterproofing layer
  • When used in contact with drinking water, ensure AquaSieldPro CW 21 and all associated North products comply with local regulations and specifications of drinking water
  • Setting time can be influenced by high relative humidity, particularly in basements or closed rooms. The use of adequate ventilation is recommended.
  • The substrate moisture content must be ≤ 5% moisture content, with no rising moisture
  • Do not add cement sand or any other additives which may affect its properties.
  • Do not add water or fresh mortar to the material that has begun to set. Just remix again for 1-2 minutes.
  • The product should not be exposed to moving water during the application or prior to the initial set.
  • Mix only sufficient material by mechanical means that can be applied using available labor and equipment to ensure a continuous and uninterrupted application.
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