Cementitious Self-leveling Floor Mortar

Description

MUHU Cementitious Self-leveling Floor Mortar is a self-leveling cementitious, non-structural, floor underlayment intended for use over poured in-situ and precast concrete floors which will be covered by carpet, vinyl, ceramic tiles or natural stone. Only water needs to be added at the job site to obtain the desired consistency for pumping or manual installation.

Recommended For

• finishing rough screeded floors
• levelling up floors
• refurbishing old floors
• resurfacing internal rain damaged floors

Features & Benefits

• highly fluid and pumpable for fast installation
• rapid strength gain for fast installation of floor coverings
• low installed cost
• resistant to cracking
• ready for foot traffic after 3-4 hours
• return to service in 24 hours
• suitable for most carpet and tile adhesives

Performance Data

Properties

Application Directions

Substrate condition
Substrate must be clean and free of oil, sealers, curing compounds, paint, polymer coatings, dust or other foreign (bond breaking) matter.
Remove all weak or broken pieces of concrete. If necessary, employ mechanical cleaning methods and equipment. If sealers, paint, polymer coatings or curing compounds are present on concrete substrate, remove with mechanical shotblasting equipment.
It is best applied where the application temperature is between 5 degree C and 30 degree C.
Voids and cracks (water pipes, holes, drainage pipes etc) should be filled to prevent seepage through to lower levels.
Note: Joints should always be cut in toppings directly above those in the base slab to avoid random cracking.

Priming

Apply this Primer to the dry substrate by roller, brush, low pressure spray or squeegee. On very porous or absorbent substrates, 2 coats may be required to effectively seal the substrate. Take care to avoid puddling of the primer. Allow to fully dry before application of this.

Mixing

For small areas, a slow speed stirrer of not more than 4 minutes.
Place the required quantity of water into the mixing vessel. Whilst mixing, slowly add the powder to the water within 3 minutes then mix for a further 1 minute. Allow mixed this to stand for 3 minutes and then remix prior to application.
For improved efficiency and continuous production of it, it is recommended to use at least two mixing buckets.
For larger jobs, the use of a mechanical mixer/pump unit is recommended.

Method of use

Pour mixture over substrate or pump through a suitable pump to desired thickness.
For hard to reach areas and touch-ups, a spreader may be used.
Whether pouring from a mixing vessel or using a mechanical mixer with an application hose, the discharge point should be approximately 200mm from the floor to prevent splashing and air entrapment.
Progress should be steady and even. Application should take place continuously into the preceding wet material to ensure even thickness and flow. Do not make new edges and fill in the middle.
The fresh wet topping can be rolled immediately with a suitable long spiked roller to release all air retained within the underlayment. Do not roll material that has been applied for more than 2-3 minutes. Edges may be feather edged using a steel trowel if required. Maximum thickness should be 20mm. If greater thickness is required, It should be mixed with silica sand (0.7-1.2mm or 1.0 -2.0mm) on a 1:1 basis by volume and applied to a maximum of 50mm

Curing

It is self-curing, but as with all cementitious products, in hot weather take adequate measures to protect it from exposure to direct sunlight and hot winds. DO NOT use water spray or liquid membrane curing compounds as these may affect the surface texture or prevent bonding of subsequent adhesives used with floor coverings.

Cleaning

Tools should be cleaned with water before the material hardens. Hardened material will need to be mechanically removed.

Shelf Life

It can be stored in tightly sealed original bags for 6 months if kept dry and at a moderate temperature.

Packaging

Available in 30kg moisture resistant bags.

Precautions

It is not toxic, but as with other products containing cement it has an alkaline nature and thus can be irritating to skin and eyes. Wear simple dust masks and gloves when handling. Keep out of reach of children. Wash off splashes of material with clean water. If irritation persists, seek medical advice.