Water Based Primers

NURPRIME WB is a pure bitumen emulsion supplied as a viscous liquid for water proofing to substructure and super structure areas in buildings and civil engineering projects. The coating is dark brown in colour and dries to black flexible protective film.

The primer is produced on the base of bitumen dispersion in water; it does not contain solvents. The primer has a neutral smell, so it is perfectly suited for indoor works.

Features and Benefits

Thanks to its superior adhesion, bituminous membrane can be adhere on the surface excellently.
After evaporation of the water it contains, it forms a waterproof and water-insoluble layer.
Suitable for interior applications because of non-toxic and non-flammable content.
Water based. Environment friendly.
Adheres perfectly to all kind of surfaces, even when the surface is moist.

Fields of Application

Used as a primer before the application of all brands of roll or liquid bitumen membranes.
In all horizontal and vertical applications.
In base of buildings, underground storehouses and basements insulation from the direction of water (positive direction).
In wet areas insulation such as bathroom, kitchen, balcony.
In parquet flooring applications with hot bituminous materials, it is applied over the screed as an undercoat.
Applied onto construction molds for easy demolding and providing a smooth surface.

Typical Technical Data

Properties	Valies/Limits
Color	Dark Brown/ Black Coating
Solid content	32±2%
Specific gravity at 25°C	1. 02 ± 0.02
Service Temperature	5°C to 85°C
Application Temperature	5°C to 65°C
Drying time at 25°C	Touch Dry - 2 to 4 Hours per coat Hard Dry - 5 to 6 Hours Firm Dry - 24 Hours
Chemical Resistance	Water, aqueous groundwater, Salt solutions, mild detergents, Acids and Alkalis
Softening Point	50°C to 55°C

*All values are subject to 5 - 10 % tolerance

Application

General waterproofing and damp proofing of concrete, brick walls/foundations, asbestos cement sheets, roofing felts, woods etc. Protection of steelwork, pipes and metal.

Agitate the drum before use. The drum should be rolled on the ground back and forth before decanting material.
Apply by brush or roller. Two or more coats must be applied to ensure a durable finish. Second and subsequent coats should be applied at right angles to each other once previous coat have fully cured, allow min 24 hours between first and second coat for better curing.
NURPRIME WB can be applied to damp but not water clogged surfaces, dampen the brush before and occasionally during use, for smoother application.

Surface Preparation

The surface shall be cleaned thoroughly of all contaminants like dust, traces of curing compound, oil and grease. Light mechanical grinding/grit blasting/high pressure water jet may be used to clean the surface of all the contaminants depending on the degree of contamination on the surface to be coated. All surface imperfections and protrusions shall be removed and repaired. Structurally unsound and friable concrete must be removed and repaired

Priming

It is highly recommended to apply a priming coat prior to the application of the NURPRIME WB on the substrate. The primer can be prepared in the site by diluting NURPRIME WB with 20% water and applying this diluted coat as the primer. The primer can be applied to damp or freshly cast concrete surfaces. For very dry and porous substrates apply two coats of this primer. However, it should not be applied on waterlogged or flowing water areas. Further coats shall be applied only after the primer coat dries off completely. In case of delay in application of the top coat for more than 24 hours, a fresh coat of primer shall be re-applied.

Coverage

Apply the coating at a coverage rate of 0.5-1 Lt/ m2, depending on the dry film thickness required. 500 micron dry film thickness (DFT) can be achieved when applied at 0.94 Liter/m2/Coat.

Storage

Up to 6 months in tightly sealed, undamaged container. It should be stored indoors.

Health & Safety

It is non-hazardous and non-flammable emulsion. Harmful if taken internally avoids contact skin and eyes. In case of accidental contact with eyes, wash with copious amount of water and seek medical attention. Wear gloves and goggles.

Remarks

Empty cans should be disposed as per the rules and regulations of the country where the material is used. And in NO case should empty cans be used for food stuffing.

PACKAGING

NurPrime WB is supplied in 20 litre pails and 200 litre drums.