Description
Description:
Nitobond AR is a modify ed acrylic emulsion specially designed for use as a bonding aid and gauging liquid for cementitious systems. It is resistant to hydrolysis and can therefore be used for external applications. Nitobond AR is the recommended primer for the Fosroc cementitious repair system.
Uses:
Recommended primer for Fosroc cementitious repair system. For improving and bonding fl oor toppings, renders and mortars; repair of worn, damaged or spalled concrete; polymer modify ed Fl our screeds.
Advantages:
Simply brush onto concrete as a primer. Single component gauged as required.
- High adhesion -Provides excellent bond to concrete,
masonry, stonework plaster and block board. - Increased strength – Improves tensile and fl exonal properties
of mortar. Allows thin section applications. - Versatile – Compatible with all common hydraulic cements
- Economical – Economical to use
Technical support:
Fosroc off errs a technical support service to specific errs, end users and contractors, as well as on-site technical assistance in locations all over the country.
Properties
Specific c gravity: 1.025 to 1.04 g/cc
Mechanical properties:
Typical improvements in mechanical properties of a 3 : 1 cement mortar /sand using Nitobond AR.
Mechanical properties Curing Control Nitobond AR
conditions
Adhesion to concrete Dry 5.0 20.0
Slant shear strength
N/mm2 ( BS 6319)
Specifi cation clauses
As a bonding agent
The bonding agent shall be Nitobond AR an acrylic based emulsify ed solution containing a minimum of 43% solids and
compatible with cementitious materials. The bonding agent shall provide adequate bond strength when directly applied on
concrete and also mixed with neat cement.
As a mortar modify er
The mortar modifies shall be Nitobond AR, an acrylic emulsifies ed cement modify er which provides good bond with concrete/ masonry and improves the fl exonal strength, tensile strength properties of the mortar when added in the specific ed quantities. It shall be compatible with all common hydraulic cements.
Application instructions
Surface Preparation
The object of the surface preparation is to achieve a clean sound surface with a good mechanical key. All substrates
should be cleaned and free of dust, plaster, oil, paint, grease, corrosion deposits, and any other deleterious substances. Latency should be removed by mechanical means. Oil or greasy deposits should be removed by suitable means. All surfaces so treated should be thoroughly washed with clean water. Smooth substrates must be mechanically roughened e.g., by scabbling, needle gun or grit/ sand blasting to provide a mechanical key. Concrete repairs: Remove all surface dust and debris. Any reinforcing steel in the repair area should be exposed around its full circumference and cleaned to remove all loose scale and corrosion deposits and then primed with Nitozinc Primer.
Priming:
Immediately before priming, the concrete substrate should be thoroughly dampened with water and any excess being
brushed off. Scrub Nitobond AR into the substrate. Avoid pudding of the emulsion. The repair mortar/topping should be
applied whilst the primer is still tacky. The bond coat becomes tacky in about 2 minutes and best results are achieved if the
mortar is applied within the next 5-10 min in case of Nitobond AR slurry coat (1 volume of Ntiobond AR + 1.5 volume of water + 1.5 volume of cement), best results are achieved, if mortar is applied within 5 minutes of application of bond coat.
Estimating
Packaging
Nitobond AR is supplied in 1-, 5- and 20-liter plastic containers.
Coverage
Approximately 6 – 8m2/ liter depending on substrate
Storage
Shelf life
12 months at 300C. Nitobond AR should be protected from frost.
Precautions
Health & Safety instructions
Nitobond AR is nontoxic. However, it should never be ingested and if it comes in contact with eyes, wash immediately with
plenty of water and seek medical treatment. Nitobond AR is slightly alkaline. Skin contact should be avoided. Gloves and protective clothing should be worn during application.
Fire
Nitobond AR is non-Fl amiable. Flash point: 480C
Additional information
Nitobond AR forms a part of the Fosroc concrete repair system. Fosroc manufactures a wide range of products specific Cally designed for repair and refurbishment of damaged reinforced concrete. This includes hand-placed and spray grade repair mortars, Fl urid micro concretes, chemical resistant epoxy mortars and a comprehensive package of protective coatings. In addition, a wide range of complementary products is available. This includes joint sealants, water proof ng membranes, grouting, anchoring and specialized fl oaring materials.
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