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Sika® Astar

One Component, Multi-Purpose Primer

Sika® Astar is a one part, multi-purpose, acrylic co-polymer based dispersion used to prime and seal concrete or mortar substrates prior to underlayment mortar application.
Suitable for use in hot and tropical climatic conditions.

  • Effectively seals concrete surfaces in a single, economic operation
  • Preventing water loss into the substrate and bubbles forming in the leveling material, reducing absorbency
  • Odourless
  • Improving adhesion on smooth and sound substrates
  • Useful for internal or external applications and wet areas
  • Low consumption / high coverage
  • Compatible to many substrates
  • Easy to apply
  • Coloured
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Usage

  • As a primer for reducing absorbency, to improve adhesion on smooth and sound substrates
  • As a primer for ceramic and tile adhesives
  • As a primer to protect the substrate against moisture from leveling compounds
  • Suitable for using prior Sikafloor® Level cementitious underlayment product range
  • Primer for mortar applications on cement plates, gypsum and concrete boards
 

Advantages

  • Effectively seals concrete surfaces in a single, economic operation
  • Preventing water loss into the substrate and bubbles forming in the leveling material, reducing absorbency
  • Odourless
  • Improving adhesion on smooth and sound substrates
  • Useful for internal or external applications and wet areas
  • Low consumption / high coverage
  • Compatible to many substrates
  • Easy to apply
  • Coloured

Packaging

20 L cans and 200 L drums

Colour

Pink liquid

Product Details

Sustainability / Certifications / Approvals

SUSTAINABILITY

Sika® Astar is certified according "Low Emitting Materials as per Al Sa'fat - Dubai Green Building Evaluation System" by Dubai Central Laboratory (DCL) certificate No. CL17020432
Product Information

Composition

Water based acrylic co-polymer dispersion

Shelf life

12 months from date of production.

Storage conditions

Store in cool and dry conditions in unopened, undamaged and sealed original packaging at temperatures between +5 °C and +35 °C. Protect from direct sunlight, heat and moisture.

Density

~1.02 kg/l (25 °C)

 

Application

Application Information

Ambient Air Temperature

+10 °C min. / +35 °C max.

Relative Air Humidity

Max. 75 %

Substrate Temperature

+10 °C min. / +35 °C max.

Applied Product Ready for Use

Ready to overcoat after 4 to 8 hours, depends on weather conditions.
Consumption

Consumption

Depending on surface absorption 0.1 - 0.2 kg/m2. Some substrates will require higher consumption than indicated above. This figure is theoretical and does not include for any additional material required due to surface porosity, surface profile, variations in level and wastage etc.
Application steps

APPLICATION

  • Shake or stir Sika® Astar well before use.
  • Sika® Astar is applied by brush or roller (whichever achieves better penetration and productivity).
  • Avoid formation of puddles.
  • After drying, mortar, levelling layers, ceramic and tile adhesive can be applied.

CLEANING OF EQUIPMENT

Clean all equipment and tools with water immediately after use. Dried material can only be removed by mechanical means.

 

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