Cempatch Repair Concrete
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Cemfair FD
 

Cemfair
PF

POLYMER MODIFIED CEMENTITIOUS FAIRING COAT AND COSMETIC REPAIR MORTAR
 
Advantages:
  • Excellent adhesion to concrete, no independent primer or curing is required

  • Compatible with other types of protective coatings

  • Suitable for internal and external applications

  • Reduces any potential cracking

  • Easy to apply, single component which requires only addition of water

Description:

Cemfair PF is a one component acrylic polymer modified powder. When mixed with water Cemfair PF produces a highly consistent, smooth, fine, trowellable mortar.


Usage

Cemfair PF is a shrinkage controlled polymer modified cementitious repair mortar which reduces any potential cracking. Cost effective, hand applied no formwork is required.

For fair face concrete repair.
As a thin layer render.
As a skim coat for pin holes and minor honeycombed concrete repair.
As pore sealer and leveling mortar.
To produce a uniform surface for subsequent paint finish.


Materials Supplied

20kg polythene-lined paper sacks 

Coverage

Approximately 14 liters/ 20 kg bag.

Cemfair PF can be applied by single application from feather edge to 3 mm thickness. Higher thicknesses can be achieved by applying multiple layers.

Storage/ Shelf Life

Cemfair PF has a shelf life of 12 months from date of manufacture if stored at temperatures between 2°C and 35°C.

Standard

  • EN 1504-3:2006, Class R2.

Technical Information

Compressive strength
EN 12190
≥ 15 N/mm2
Adhesive bond
EN 1542
≥ 0.8 N/mm2
Restrained shrinkage
EN 12617-4
≥ 0.8 N/mm2

Restrained expansion
EN 12617-4
≥ 0.8 N/mm2

Elastic modulus
EN 12412
for Class R2
Mixed density1.85 ± 0.05 g/cm3
Working life 60 min
Setting time2 – 3 hr
Soluble chloride content
EN 1015-17
≤ 0.05 %
ColorGrey
Thermal compatibility - freeze/thaw cycling
EN 1542
≥ 0.8 N/mm2
The technical data are specified at 22 ° C.

Application Information


SUBSTRATE PREPARATION
All surfaces should be clean, sound and uncontaminated prior to the application of Cemfair PF. The prepared area should be cleaned thoroughly by brush and/or compressed air. The prepared area should be soaked with water immediately prior to the application of Cemfair PF.

MIXING
To ensure proper mixing, a mechanically powered mixer or drill fitted with suitable paddle should be used. However for small quantities, Cemfair PF can be hand mixed using proper tools and bucket. For one full bag, 6.0 - 6.8 litre of fresh water should be added to a clean container.  
The powder is then added slowly to the water while mixing continuously with low speed mixer/drill (400 - 600 rpm). Mixing time should be continued for 3 minutes until uniform consistency is obtained.
To enhance the scratch resistance of Cemfair PF, an addition of Cempatch SBR is advisable. 50% of the total mixing water shall be replaced by Cempatch SBR.

APPLICATION
No independent primer is required. Cemfair PF can be applied by steel trowel. The mixed mortar can be applied to the prepared substrates at up to 3 mm thicknesses. The applied mortar should be allowed to stiffen before trowelling to a smoother finish.

CURING
Curing is not required for  Cemfair PF in normal ambient conditions. In the case of harsh weather conditions, such as high wind and temperatures, it is recommended to cure with Setseal A or wet hessian with polyethelene.




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