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Organic Solvents Protection
Nano-Shield OSP is a completely inorganic coating/topping used primarily as protection of concrete against penetration of organic solvents and emulsified hydrocarbons. It also provides a highly effective waterproofing on both negative and positives sides. It is used mainly in concrete tanks, as topping or coating on floors, and in secondary containment structures. In combination with Cem-Kote Barrier Coat 100 it can be bonded, by using special procedures, to oil contaminated concrete. Nano-Shield OSP is also used as waterproofing coating for existing water storage and water treatment concrete structures, digesters, clarifiers and utility vaults. Nano-Shield OSP is suitable for waterproofing of retaining walls, basements, concrete slabs, swimming pools and other concrete structures.
Composition and Materials
Nano-Shield OSP is one component (add water only), completely inorganic composition containing Portland cement, silica fillers and inorganic binders.
Nano-Shield OSP develops its resistance to penetration of solvents by wet curing. It must be wet cured for approximately 3 days.Mix only amount of material which can be applied within a 30 minutes period of time. Nano-Shield OSP must not be used in acidic environments. Do not apply Nano-Shield OSP when the temperature is expected to be below 4ºC (40ºF) or when rain is imminent. The proper surface preparation is essential for successful bond of Nano-Shield OSP.
Health and Safety
Nano-Shield OSP is non-toxic and non-flammable. Your skin might be sensitive to cement. We recommend use of rubber gloves. Avoid contact with skin. If contact occurs, flush immediately with water. Seek medical advice if irritation occurs. Harmful if digested. KEEP THE PRODUCT OUT OF REACH OF CHILDREN. FOR INDUSTRIAL USE ONLY. Consult MSDS for additional information.
Nano-Shield OSP Premix is a one component material packaged in 22.7 kg (50 lb.) bags.
Nano-Shield OSP Premix yields 13.2 L (0.47 ft³) and the theoretical coverage is 6.6 m² @ 2 mm thickness (or 71 ft² @ 80 mils thickness). The thickness of application varies depending upon the actual end use. 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, application rate and method of application. Please contact Technical Services for further information.
Storage and Transportation
Nano-Shield OSP stored on pallets in a dry, cool area has a shelf-life of 12 mohths. Packaged 55 bags per pallet.
(ASTM C109 Modified)
|44.8 – 51.7 Mpa
(6,500 – 7,500 psi)
|Modulus of Rupture
(ASTM C348) 28 days
|6.2 – 7.8 Mpa
(900 – 1,130 psi)
|Bond Strength with Concrete (Pull off test)||Greater than the tensile strength of the concrete substrate|
|Water Vapour Permeance
3 mm (1/8″) thickness
|1.1 metric perms|
|Hydraulic Permeability||Concrete block coated with Nano-Shield OSP withstands 135 m (500 ft) water head pressure|
Current Guide Specification and Application Instructions contain additional information specific to each application and must be followed. Contact Technical Service for information specific to your application.
Remove all loose and deteriorated concrete, laitance, dust, dirt and efflorescence. High pressure sandblast or waterblast (minimum 6,000 psi) should be used.
The active water leaks must be stopped using MEADOW-PLUG™ from W. R. Meadows and deeper surface deterioration repaired with MEADOW-CRETE® OV (OVERHEAD). Leave the surface of MEADOW-CRETE OV rough and wash it thoroughly with high pressure water before application of NANO-SHIELD OSP. NANO-SHIELD OSP should be applied within 48 hours after the surface repair.
Remove all loose rust from any exposed reinforcing steel and apply two coats of PATCH-PRIME™ Exposed Steel Primer.
Any existing cracks must be treated separately using Cem-Kote Flex ST or Cem-Kote Flex Plus.
Mix one bag, 22.78 kg (50 lbs.) with approximately 4.5 – 5.0 litres (1.1 – 1.3 U.S. gallons) of water. 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.
Brush apply Nano-Shield OSP in two consecutive coats to achieve the specified thickness – typically 2 – 3 mm, (80 – 120 mils). No wetting is required between the coats. The re-coating must be done within ½ to one hour. When layers over 3 mm (1/8″) are required, apply a thin layer of Nano-Shield OSP first as a bonding agent by brush or broom. Apply second, stiffer consistency, coat of Nano-Shield OSP into the wet slurry by trowel. Keep wet edge. Do not build up a layer thicker than 6 mm (1/4″). Follow current manufacturer’s Guide Specifications, Application Instructions and the specified rate of application.
Moist cure Nano-Shield OSP for a minimum of 3 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 Nano-Shield OSP.
All tools and equipment must be cleaned with water immediately after use. Cured material must be removed mechanically.
A limited twelve (12) month Material Replacement Warranty is available. For details contact Technical Service.
For advice on suitability of Nano-Shield OSP for a specific application, specification assistance and application advice contact Technical Services at 1-800-563-3618.
The organic solvent resistant, waterproofing coating/topping will be Nano-Shield OSP as manufactured by Gemite Products Inc. It will meet all the Technical Data specified in the current Nano-Shield OSP Product Data Sheet.
Gemite Products, Inc.
1787 Drew Road,
Mississauga, ON L5S 1J5