KYK Megaİzo PU 7 S401
Polyurethane-Based Super Elastic Waterproofing Material
Waterproofing is one of the most critical applications for ensuring the long-term durability and safety of a structure. Especially in wet areas, terraces, and surfaces exposed to outdoor conditions, waterproofing materials must provide both high elasticity and strong resistance.
KYK Megaİzo PU 7 S401 is a single-component, polyurethane-based, super elastic waterproofing material developed to meet these requirements.
After application, it forms a seamless membrane layer with strong adhesion properties on the surface. It effectively protects surfaces against water leakage, moisture-related problems, and chemical effects.
Key Features of the Product
| Feature | Advantage |
|---|
| Single-component, ready-to-use | No mixing required; fast and practical application |
| Super elastic structure (%600 elongation) | Adapts to surface movements and prevents cracking |
| Water vapor permeable | Prevents moisture accumulation |
| Chemical resistance | Resistant to acidic, alkaline, and oily environments |
| -30°C / +90°C temperature resistance | Maintains performance under harsh weather conditions |
| Solvent-free formulation | Environmentally friendly and suitable for indoor use |
| High adhesion strength | Strong bonding on concrete, screed, metal, and ceramic surfaces |
Application Areas
KYK Megaİzo PU 7 S401 is used for waterproofing applications before coating on horizontal and vertical surfaces in both interior and exterior areas.
Main application areas:
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Wet areas such as bathrooms, kitchens, and toilets
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Balconies and terraces
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Sloped roofs
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Swimming pools
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Parking deck floors
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Water tanks and technical areas
⚠ It should not be used on surfaces exposed to negative water pressure.
Surface Preparation
Proper surface preparation is essential for a durable and successful application:
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The surface must be cleaned from dust, dirt, oil, and loose particles.
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Surface defects deeper than 1 cm must be repaired with suitable repair mortars.
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Corners and connection points should be properly rounded or reinforced.
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The appropriate primer should be selected according to the surface type.
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Surfaces such as ceramic, PVC, and glass should be roughened to improve adhesion.
Application Method
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The product is ready to use; only mixing before application is required.
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Apply at least 2 coats.
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Maximum recommended thickness per coat: 0.7 mm.
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Waiting time between coats: minimum 12 hours, maximum 36 hours.
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Total dry film thickness: approximately 2 mm.
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During application, the surface must be protected from rain, frost, and strong wind.
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If a top coating will be applied, the surface must be completely dry.
Technical Performance Values
| Test | Value | Standard |
|---|
| Adhesion Strength | > 0.2 N/mm² | TS EN 14891 |
| Elongation at Break | >600% | ASTM D 412 |
| Tensile Strength at Break | >1.80 N/mm² | ASTM D 412 |
| Water Pressure Resistance | No leakage (1 m / 24 hours) | DIN EN 1928 |
| Water Vapor Permeability | Class II | EN ISO 7783-2 |
| Hardness | 65 ± 5 Shore A | ASTM D 2240 |
| Reaction to Fire | E | DIN 4102-1 |
The values are obtained under laboratory conditions.
Packaging and Consumption
| Property | Value |
|---|
| Packaging | 25 kg metal can |
| Color | Grey |
| Density | 1.50 ± 0.05 g/cm³ |
| Consumption | 2.5 – 3.0 kg/m² for 2 mm thickness |
| Shelf Life | 12 months |
Storage:
Store in a dry environment between +5°C and +25°C.
Application Conditions
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Application temperature: +5°C to +35°C
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Pot life: 6–8 hours
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Coating application: Minimum 3 days later
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Full service use: Minimum 7 days later
Advantages Provided
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Seamless and continuous waterproofing membrane layer
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Structure that prevents moisture accumulation
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Suitable for industrial applications thanks to chemical resistance
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Excellent crack-bridging capability
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Solvent-free and environmentally friendly formulation
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Long-lasting performance
Frequently Asked Questions
On which surfaces can it be applied?
It can be applied on concrete, screed, plaster, metal, ceramic, glass, PVC, and bituminous surfaces.
Is it resistant to negative water pressure?
No. It is only suitable for positive water pressure applications.
What is the drying time?
A minimum of 12 hours should be waited between coats. For full performance, a waiting period of 3–7 days is recommended.
Can it be applied under ceramic tiles?
Yes. Ceramic coating can be applied after using the appropriate primer and allowing sufficient drying time.
Conclusion
KYK Megaİzo PU 7 S401 is a professional polyurethane waterproofing solution that provides high elasticity and durability for wet areas, balconies, terraces, and swimming pool applications.
Thanks to its solvent-free structure, high crack-bridging capacity, and strong adhesion performance, it provides long-lasting and reliable waterproofing protection for both residential and industrial projects.