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External Insulation
Plaster

  • Waterproofing is achieved in rain- and water-exposed areas such as terraces and balconies through the use of WELTEZ insulation products.

  • The material is breathable.

  • It prevents condensation, mold, moisture, and sweating.

  • Due to its natural composition, it contains no carcinogenic substances.

  • Its lightweight nature protects the building from unnecessary loads.

  • It offers effective fire protection.

  • Provides both thermal and sound insulation simultaneously.

  • Thanks to its hydrophobic (water-repellent) properties, it prevents moisture accumulation on terraces.

PRODUCT TECHNICAL SPECIFICATIONS

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Time Factors

Drying Time: 8 hours at 20°C and 65% relative humidity (RH)
Full Curing Time: 28 days at 20°C and 65% RH
Ready for Painting: 52 hours at 20°C and 65% RH
Plastering Time: 60-90 minutes at 20°C
Setting Time: 120-180 minutes at 20°C and 65% RH
Shelf Life: 1 year from production date under ideal conditions (store in a dry place at 5-35°C)

Packaging and Appearance

Packaging: Polyethylene-reinforced kraft paper bags
Color: Pure White (RAL 9010)
Density: Granular form: 175 ±5 kg/m³

Solid form: 340-365 kg/m³

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Thermal and Acoustic Properties

Thermal Conductivity: 0.045 W/m·K (tested according to EN 12667)
Sound Absorption: 25 dB at 500 Hz with 3 cm thickness
Fire Resistance: Non-combustible Class A1/A2 (according to EN 13501-1)

Strength Properties

Compressive Strength: Interior: ≥0.7 N/mm² (at 23°C and 50% relative humidity)

Exterior: ≥1.0 N/mm² (at 23°C and 50% relative humidity)

Adhesion Strength: 0.40 N/mm² (measured according to EN 1015-12)

Bending Strength (N/mm²): Interior: ≥0.5 N/mm² (after 28 days curing)

Exterior: ≥0.8 N/mm² (after 28 days curing)

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Water Properties

Capillary Water Absorption: 0.3 kg/m²·√h (measured according to EN 1015-18)
Total Water Absorption: <15% (measured according to EN 1015-10)

Application Information

Application Method: PFT G4/G5 spraying machine or stainless steel trowel
Application Thickness: Minimum 5 mm, maximum 50 mm in a single layer
Consumption: 8 kg covers approximately 3 m² at 1 cm thickness
Cracking: No cracks between 5 mm and 50 mm thickness

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HOW TO APPLY?

WALL PREPARATION
 

  1. The surface to be plastered must be free of oil, dirt, dust, and paint. For special applications (rough walls), the adhesion value of the plaster can be increased if necessary.
     

  2. For walls made of brick, pumice block, etc., it is sufficient to wet the surface and remove dust.
     

  3. Main battens are nailed or glued and mounted according to the desired insulation thickness.
     

  4. The wall is prepared and ready for insulation application.
     

  5. One bag (60 liters) of plaster can cover 3 m² of wall area at 1 cm thickness.
     

WELTEZ PREPARATION AND APPLICATION STEPS

For 1 kg of dry WELTEZ:
 

  1. Pour 0.225 liters of water into a clean tank to keep small components in suspension.
     

  2. Add all 1 kg of material into the tank at once.
     

  3. Add another 0.600 liters of water to the tank.
     

  4. Mix the material for 3 minutes with up-and-down and circular motions.
     

  5. Check the plaster consistency with a trowel.
     

  6. Apply this mixture to the relevant surface by hand or machine.
     

  7. This mixture must be used within 2 hours.

WATER RATIOS

For 1 kg of WELTEZ dry plaster (Total water: 0.825 L)

  • Step 1: 0.225 L water

  • Step 2: 0.600 L water
     

For 8 kg of WELTEZ dry plaster (Total water: 6.6 L)

  • Step 1: 1.8 L water

  • Step 2: 4.8 L water
     

For 16 kg of WELTEZ dry plaster (Total water: 13.2 L)

  • Step 1: 3.6 L water

  • Step 2: 9.6 L water
     

IMPORTANT NOTES
 

  1. To ensure proper distribution of the small polymer components in the bag, all material must be poured into the tank at once.
     

  2. The desired insulation material can be customized during the production process with polymer recipes according to the climate (hot–cold–humid–dry, etc.) and the surface type (e.g., vibrating metal factory wall).
     

  3. The prepared mixture must be consumed within 2 hours.
     

  4. During application, the ambient temperature should be above 5°C.
     

Drying Time:
 

  1. After 8 hours (at 20°C): Weltez becomes workable.
     

  2. After 10 days (at 20°C): Special tests can be performed.
     

  3. After 28 days (at 20°C): Full drying (calcification) is achieved.

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