About this product
High-performance, self-smoothing floor levelling compound (1 - 10 mm)
New work
● Cement screeds
● Concrete slabs
● Pre-cast concrete floors
● Underfloor heating or under tile
warming
Renovation
● Existing tiling
● Rigid plastic tiles
● Existing paints (epoxy, polyurethane, acrylic)
Suitable for covering with:
● Tiling
● Carpeting
● Flexible floor coverings
● Parquet flooring
● Certain floor paints
weber.niv floor is compatible with the adhesives used with the coverings listed above.
In situations that will be very humid, such as bathrooms, weber.sys protect tanking system may be applied over weber.niv floor.
Features and Benefits
▲ Manufactured under BSI Quality Assurance Scheme ISO 9001
▲ Rapid drying (may be covered after 4 to 6 hours)
▲ Can built up to 10 mm in depth
▲ Used for difficult substrates
▲ Flexibility to absorb limited movement, e.g. underfloor heating
▲ Excellent spreading characteristics
▲ Provides a very smooth finish
▲ Can be pump fed for large areas as a special application by contractors approved by Weber
Technical data
Constraints
Do not use:
on permanently damp floors or floors
with rising damp
on friable or unstable floors
in industrial areas
on exterior floors
Preparation
Switch off any under-floor heating systems at least 24 hours before application.
Substrates should be completely dry, hard, rigid and clean.
Remove any traces of paint, plaster, laitance or other unsound materials. Thoroughly remove all traces of dust by vacuuming or sweeping. Fill in any localised deep holes and allow to dry before applying the levelling compound.
Holes up to 25 mm deep can be filled with weber.niv floor bulked out with 0 to 4 mm sand (2 volumes weber.niv floor to 1 volume of sand). Allow to harden.
Priming is recommended to improve adhesion, reduce air bubbles and prevent suction from the substrate de-watering the leveller. It may not be necessary for medium porosity substrates, but all others must be primed, and the primer allowed to dry, before applying weber.niv floor.
Very porous or slightly porous surfaces should be primed with weber PR360 and allowed to dry for 1 to 4 hours. Anhydrite screeds must be primed with weber PR360. Completely impervious surfaces should be primed with weber PR301 and allowed to dry for 2 to 3 hours.
Mixing
Do not mix if the temperature is outside of the range + 5°C to + 30°C.
Thoroughly mix 5.5 to 6 litres of water per 25 kg bag using a slow speed electric mixer (500 rpm) for at least one minute until a fluid, homogenous paste is obtained.
Care should be taken not to over-water.
Allow the mix to stand for 2 minutes before use, and use within 20 minutes. At higher temperatures this time will be reduced.
Application
Pour the mixed weber.niv floor onto the floor. It is self-smoothing but the thickness may need to be adjusted with a straight edge or float.
Use a spiked roller or float to ensure that any pores are filled and release trapped air. The minimum application thickness is 1mm (3 mm in heavier traffic areas and under tiling). If a second coat is required, apply it as soon as the first coat has hardened.
If more than 24 hours have passed between layers, prime the first layer with weber PR360.
weber.niv floor is not intended as a wearing surface, so the final finishing layer should be applied as soon as possible after drying has completed. If it is to be left for a prolonged period of time, the surface should be suitably protected.
Allowance for movement
Allow for suitable expansion or control joints in screeds or slabs, by following them through the new topping.
ACCESSORIES
weber PR301: approximately 0.2 kg/m2.
weber PR360: approximately 0.2 kg/m2.
Storage and Shelf life
When stored unopened in a cool, dry place at temperatures above 5°C, shelf life is 12 months from date of manufacture.
Health and Safety
Contains cement (Contains chromium (VI). May produce an allergic reaction). Harmful by inhalation. Irritating to eyes and skin. Keep out of the reach of children. In case of contact with eyes, rinse immediately with plenty of water and seek medical help. After contact with skin, wash immediately with plenty of soap and water. Wear suitable protective clothing, gloves and eye/face protection.
Technical services
Technical services Weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.
Technical helpline
Tel: (01525) 722137
Fax: (01525) 718988
Sales Contact
Weber products are distributed throughout the UK through selected stockists and distributors. Please contact the relevant Customer Services Team below for all product orders and enquiries.
England and Wales:-
Tel: 08703 330070
Fax: 01525 718988
Scotland, Northern Ireland, Isle of Man, Republic of Ireland:-
Tel: 028 9335 2999
Fax: 028 9332 3232
