FOSROC NITOBAND SBR 300
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Brand: Fosroc
Product Name: Nitoband SBR 300
Weight: 1L, 5L, And 20L
Usage: Styrene-butadiene rubber (SBR) bonding and waterproofing agent for cementitious materials
Note: Enhances adhesion, flexibility, and water resistance in concrete and mortar applications.
Product Description
Uses:-
For making of polymer modified mortar and screeds , bonding agent, repair of worn, damaged and spalled concrete, slurry coat as base for waterproofing.
Advantages:-
- Simple to use – Single component, gauged as required.
- Provides excellent bond to concrete, adhesion plaster, masonry, stone work, etc.
- Provides mortar with improved durability impermeability to chlorides and other harmful agents.
- Provides waterproof and cohesive screeds, plasters and impermeable slurry coat.
- Improves tensile and flexural properties of cement thereby reduces cracking.
- Compatible with all common hydraulic cements.
- Cost effective and economical
Chemical resistance :-
Cementitious based materials have limited chemical resitance. The addition of Nitobond SBR 300 to cement mortars reduces permeability and therefore helps reduce the rate of attack by aggressive chemicals.
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. Laitence should be removed by mechanical means. Smooth substrates must be mechanically roughened e.g. by scabbling, needle gun or grit blasting to provide an adequate key.
Corroded reinforcing steel should be exposed around its full circumference and cleaned to remove all loose scale and corrosion deposits. It is always preferably to clean the steel to a bright condition. Use of emery cloth, grit or sand blasting is recommended.
Priming:-
Reinforcing steel must be primed with Nitozinc Primer immediately after cleaning. The concrete substrate should be thoroughly dampened with water and any excess water removed before being primed by thoroughly scrubbing in a slurry coat of 1 volume Nitbond SBR Latex to 1 volume water to 3 volumes fresh cement
In order to obtain a smooth consistency the cement should be blended slowly into the liquids. Stir frequently during use to off set settlement. Avoid ‘puddling’ of the slurry coat. The topping must be applied on to the wet slurry. If the slurry dries out it must be removed and the clean substrate reprimed.
Typical Mix designs :-
1. Patching and repair mortars and plaster for masonary:-
Cement 50 kg
Zone II sand 150 kg
Nitobond SBR 300 5 – 9 litres
Recommended water addition 11 – 15 litres
Recommended thickness 8 to 20mm
2. Screeding:-
Cement 50 kg
3-6mm Granite chips 75 kg
Zone II sand 75 kg
Nitobond SBR 300 5-9
litres Recommended water addition 8-12
litres Recommended thickness 10-25mm
3. Polymer modified cement grout for injection – Nitobond SBR 300 can be used to effectively modify properties of cement grout for crack injection. The dosage of Nitobond SBR 300 shall be in the range of 4 L/bag of cement. The injection is carried out as per standard practice. Note : Increased dosages of Nitobond SBR 300 and further water reduction leads to improved mechanical properties
Cleaning:-
Tools and equipment should be washed with water immediately after use.
Packaging:-
Nitobond SBR 300 is supplied in 1, 5 and 20 litre containers.
Shelf life:-
Nitobond SBR 300 has a shelf life of 12 months if kept in a dry store in unopened condition.
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