CEM-KOTE CW PLUS - Capillary/Crystalline Waterproofing
(800) 342-5976
CEM-KOTE® CW PLUS
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ANSI/NSF Standard 61 Drinking Water System Components |
DESCRIPTION
CEM-KOTE CW PLUS is a one-component (add
water only), Portland cement based coating
(slurry) containing silica-based materials. Under
water pressure (negative or positive), the soluble
silicate penetrates (due to osmotic pressure) into
the substrate, where it reacts with lime and forms
insoluble calcium silicate crystals which “plug”
the capillary pores and waterproofs the concrete
while allowing water vapor to pass.
USES
CEM-KOTE CW PLUS is a crystalline
(capillary) in-depth waterproofing for new or
existing water storage and water treatment
concrete structures, digesters, clarifiers, and
utility vaults. CEM-KOTE CW PLUS is suitable
for waterproofing retaining walls, basements,
concrete slabs, swimming pools, and other
concrete structures.
| FEATURES/BENEFITS |
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LEED INFORMATION |
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PACKAGING
CEM-KOTE CW PLUS premix is a one -
component material packaged in 50 lb. (22.7 kg)
bags.
COLOR
Industrial Grey and Light Grey.
YIELD
CEM-KOTE CW PLUS premix yields 0.47 ft.³
(13.2 L) and the theoretical coverage is 244 ft.² at
the rate of 1.84 lb./yd² (22.7 m² at the rate of 1
kg/m²). The rate of application varies depending
upon the actual end use, as specified.
The actual coverage will depend on surface roughness and the thickness applied. The applicator must carry out a sample application to determine the actual coverage for the given substrate and application rate.
SHELF LIFE
When stored on pallets in a dry, cool area, shelf life
is 12 months.
| Compressive Strength (ASTM C109 Modified) |
54.7 – 59.7 MPa (7,930 – 8660 psi) |
| Modulus of Rupture (ASTM C348) 28 days |
6.2 – 8.3 MPa (900 – 1,200 psi) |
| Bond Strength with Concrete (Pull off test) |
Greater than the tensile strength of the concrete substrate |
| Water Vapor Permeance 3 mm (1/8”) thickness |
1.8 metric perms |
| Hydraulic Permeability | Concrete block coated with CEM-KOTE CW PLUS withstands 500’ (156 m) water head pressure |
APPLICATION
Surface Preparation … Remove all deteriorated and loose
concrete, form release agents, oil, grease, laitance, dust, dirt and
efflorescence by dry or wet sandblast, shot blast, or high-pressure
water (minimum 5,000 psi [34.5 MPa] or 3,500 psi
[24.1 MPa] with sand brought to the nozzle).
Active water leaks must be stopped using MEADOW-PLUG™ from W. R. MEADOWS. Deeper surface deterioration should be repaired with MEADOW-CRETE® GPS from W. R. MEADOWS. Leave the surface of MEADOW-CRETE GPS rough and wash thoroughly with high-pressure water before application of CEM-KOTE CW PLUS. CEM-KOTE CW PLUS should be applied within 48 hours after the surface repair.
Crack Treatment … Any existing cracks must be treated separately using CEM-KOTE FLEX ST and REINFORCING FABRIC NW.
Mixing … Mix one bag with approximately 1.3 - 1.6 gal. (5 – 6 L) of water, depending on required consistency. Use a drill (400– 600 rpm) with a mixing paddle. Gradually add the dry material into water and mix until a smooth and lump-free mix is obtained. Do not over mix. Adjust the water for brushable consistency or a stiffer consistency for trowel application.
Application … Brush apply CEM-KOTE CW PLUS in two consecutive coats to achieve the specified rate of application (1.4– 2.8 lb./yd² or 0.75 – 1.5 kg/m²). No wetting is required between the coats. The re-coating must be done within ½ to 1 hour.
When layers over 1/8” (3 mm) are required, apply a thin layer of CEM-KOTE CW PLUS first as a bonding agent by brush or broom. Apply second, stiffer consistency coat of CEM-KOTE CW PLUS into the wet slurry by trowel. Keep wet edge. Do not build up a layer thicker than ¼” (6 mm). In new construction, CEM-KOTE CW PLUS is dry-sprinkle applied onto the surface of the freshly poured slabs (after the concrete starts to reach initial set) and is power trowel finished.
Curing … Moist cure CEM-KOTE CW PLUS for three days. Protect the surface from rapid drying. When working under tarps at freezing temperatures, avoid using propane heaters. Electrical heaters should be used to prevent carbonation of CEM-KOTE CW PLUS.
Cleanup … All tools and equipment must be cleaned with water immediately after use. Cured material must be removed mechanically.
PRECAUTIONS
CEM-KOTE CW PLUS is a fast setting material. Under
normal conditions, it should be applied within 15-30
minutes after mixing. Mix only the amount of material that
can be applied within this period of time. Do not apply
CEM-KOTE CW PLUS when the temperature is expected
to be below 40° F (4° C) or when rain is imminent. The
proper surface preparation is essential for successful bond
of CEM-KOTE CW PLUS.
CEM-KOTE CW PLUS is manufactured by:
Gemite Products, Inc.
1787 Drew Rd.
Mississauga, ON L5S 1J5
Canada
Tel. (888) 443-6483
Fax (888) 443-6329
Email techinfo@gemite.com
Web www.gemite.com
This material last updated August 2010.
