KOVA EXTERIOR SURFACE MASTER MT-Nis 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.
SUPERIOR CHARACTERISTICS
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.
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.
SURFACE PREPARATION
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.
CONSTRUCTION
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.
NOTE
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.
SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION
The working environment must be well ventilated. Wear gloves, masks and eye protection while working. In case of eye contact, wash with plenty of clean water and consult a doctor immediately. Please refer to the latest technical and safety documentation before use.
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