Product Data Sheet Show all documents

SikaEmaco® N 303

(former MasterEmaco® N 303)

Single component polymer modified fairing coat / cosmetic mortar for concrete surfaces

SikaEmaco® N 303 is a single component acrylic polymer modified repair mortar for use as a "fairing coat" or cosmetic mortar. When mixed with water, as directed, a fine grey trowelable mortar results which can readily be applied to fill in pores, blowholes and blemishes on a concrete surface. SikaEmaco® N 303 can be used as a 'skim' coat prior to the application of protective coatings.
SikaEmaco® N 303 is specially formulated to produce a shrinkage compensating mortar with no cracking when applied in a thin section. Adhesion to concrete and flexibility are excellent.

  • Precision made, consistent results.
  • Requires only the addition of mixing water.
  • Shrinkage compensating.
  • Excellent adhesion to concrete.
  • Flexible.
  • Smooth, easily produced finish.
  • Low permeability.
  • Stadium Grey colour available.
  • Excellent resistance to freeze / thaw action and carbonation.
  • Ingress of water borne salts, such as chloride and atmospheric / chemical attack.
  • Subsequent paint coats can be applied with greater economy.
Product Data Sheet Show all documents

Usage

As a fairing or skim coat to cover and make good blemishes in concrete surfaces such as slight honeycombing, blowholes, defects caused by 'sand runs', patch repairs, shutter movement and grout loss.
• Preparatory treatment to concrete to receive a thin film protective coating.
• To produce a uniform surface over repaired areas.  

Advantages

  • Precision made, consistent results.
  • Requires only the addition of mixing water.
  • Shrinkage compensating.
  • Excellent adhesion to concrete.
  • Flexible.
  • Smooth, easily produced finish.
  • Low permeability.
  • Stadium Grey colour available.
  • Excellent resistance to freeze / thaw action and carbonation.
  • Ingress of water borne salts, such as chloride and atmospheric / chemical attack.
  • Subsequent paint coats can be applied with greater economy.

Packaging

20kg bag

Colour

Grey powder

Product Details

Product Information

Shelf Life

12 Months from date of manufacture. Failure to comply with the recommended storage conditions may result in premature deterioration of the product or packaging. For specific storage advice consult Master Builders Solutions Construction Chemicals SA’s Technical Services Department.

Storage Conditions

Store under cover, out of direct sunlight and protect from extremes of temperatures.
Technical Information

Compressive Strength

20Mpa at 28 Days

(EN 12190)

Application

Application Information

Fresh mortar density

~18kg/ltr

Layer Thickness

Application

Minimum

Maximum

Horizontal

0.5 mm

2.5 mm

Vertical

0.5 mm

2.5 mm

Overhead

0.5 mm

2.5 mm

Ambient Air Temperature

+5 °C min. / +35 °C max.

Substrate Temperature

+5 °C min. / +35 °C max.
Consumption

Consumption

~1,7 kg/m2/mm of powder
Consumption depends on the roughness and absorbency of the substrate.
This figure is theoretical and does not allow for any additional material due
to surface porosity, surface profile, variations in level or wastage etc.

Yield

12.8ltr per 20kg bag
Application steps

SUBSTRATE PREPARATION

It is essential that the surfaces to be bonded are sound, clean and uncontaminated. All loose powdering material must be removed. Concrete surfaces should be thoroughly soaked prior to application of SikaEmaco® N 303, to ensure a saturated, but surface dry condition.

MIXING

SikaEmaco® N 303 is formulated to give an easily mixed material. For full bag quantities, it is preferable to mix the material in a Crete angle or similar forced action mixer. Alternatively, a slow speed, handheld electric mixer with a suitable paddle can be used. Over mixing should be avoided. The powder should be placed in the mixing vessel and mixing commenced. Clean water should be slowly added up to the recommended maximum or until the required consistency is achieved. No more than 5.6 litres of water per 20kg of SikaEmaco® N 303 should be added. (W/P ratio = 0.28).

 

APPLICATION

SikaEmaco® N 303 should be applied to the complete area with the minimum of trowelling. Leave for a short period before final trowelling. Finishing may be aided by flicking a small amount of water onto the surface, using a paint brush before final trowelling. When used as a "scraper coat" SikaEmaco® N 303 can be applied with a brush or roller and then the excess scraped off with the edge of a steel float. In this way blow holes and minor blemishes in an otherwise fair faced concrete can be hidden.

CURING TREATMENT

Good curing practice is essential even though SikaEmaco® N 303 is specially formulated to prevent shrinkage and cracking. Particular care is required in hot and windy conditions. Cure with a single coat of SikaKure 181 which is compatible with most subsequent protective coatings, or by covering the work with properly secured plastic sheeting or with water

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically.

 

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