Xuất Xứ: Việt Nam
  • KOVA EXTERIOR SURFACE MASTER MT-N is a specially designed, highly flexible, paste-like exterior mastic used to smooth outdoor walls before coating. Flexible mastic has outstanding hardness and adhesion, suitable for high-class works and special paint systems such as imitation stone paint, brocade paint, wood grain paint, water paint.
  • Smooth surface, easy to apply, extremely durable.
  • Tightly bonded with the capillaries of concrete and cement mortar, giving good adhesion.
  • No blistering, good weather resistance, UV resistance.
  • No crow's feet cracking.
  • Capable of sealing capillary mortar, sealing small cracks better than putty powders, used for projects requiring long-term durability.
  • 25kg barrel; 6kg barrel.
  • Applicable surface: Cement mortar, concrete, brick, plaster.
  • Dry Thickness: About 1mm per layer. The optimal thickness for 2 coats after drying is about 1.5mm. Do not apply mastic too thick because it will reduce the durability of the entire coating system.
  • Theoretical rating: 0.88 – 1.0 m2/kg for 2 layers depending on the material surface.
  • New Walls: Must be allowed to dry and stabilize the structure (minimum 12 – 15 days) and cleaned of dirt.
  • Old wall: Must scrape off grease, moss, old layers of paint, lime, then rinse thoroughly with clean water and let dry.
  • Step 1: Prepare the mixture according to the following ratio: 6kg barrel of flexible Mastic: 1-1.5 kg of Cement + Amount of clean water (just enough). Box of 25 kg of flexible Mastic: 4-7 kg of Cement + Amount of clean water ( just enough).
    • *Note: Mix cement with a sufficient amount of clean water to form a paste, stir thoroughly until homogeneous. Then, mix the cement and water with KOVA flexible Mastic. Adjust the appropriate paste for easy application.
  • Step 2: Use two layers of trowel, spaced 3-4 hours apart. Leave to dry after 6-8 hours, use sandpaper to flush flat, blow away dust, can apply primer.
  • The water used to make mastic is absolutely clean water. Do not use dirty or contaminated water.
  • If the wall has cracks, it must be filled with Elastic Waterproofing Agent CT-14 first.
  • If the weather is too dry, it is necessary to moisten the wall before applying flexible mastic.
  • It is not recommended to apply too thick flexible mastic because it will reduce the durability of the entire coating system.
  • Do not add other powders to KOVA flexible mastic.
  • Clean tools with clean water immediately after use.
  • If flexible mastic has been mixed with a mixture of water and cement, it must be used within 1 hour, because after that time the product will harden.

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