KYK Megaİzo S804

Bitumen-Polyurethane Based Super Elastic Waterproofing Material

What is KYK Megaİzo S804?

KYK Megaİzo S804 is a bitumen-polyurethane based, single-component, ready-to-use waterproofing material. After application, it forms a seamless, thick, and elastic membrane layer on the surface. It maintains its mechanical performance between temperatures of -30°C and +90°C.

It is solvent-free and resistant to up to 10% acid and alkaline solutions, detergents, seawater, oils, and various chemicals. Thanks to its high adhesion strength and crack-bridging capability, it provides a long-lasting waterproofing solution, especially for underground applications.

Application Areas

KYK Megaİzo S804 can be safely used in the following areas:

• Foundation and foundation base waterproofing applications
• Retaining walls and reinforced concrete walls (against underground water and seepage water)
• Wet areas such as bathrooms, toilets, kitchens, and balconies (under tile applications)
• Horizontal and vertical surfaces in interior and exterior spaces

⚠ It should not be used on surfaces exposed to negative water pressure.

Key Advantages

Suitable for underground applications:
Does not sag or flow on vertical surfaces and creates a thick waterproofing film layer.

Super elastic structure:
Provides high crack-bridging performance (CB2).

High adhesion strength:
Provides strong bonding performance on mineral surfaces such as concrete, plaster, and screed.

Chemical resistance:
Resistant to seawater and aggressive environments.

Wide temperature resistance:
Maintains performance between -30°C and +90°C.

Easy application:
Single-component formulation; can be applied by brush, roller, or airless spray system.

Application Instructions

• Apply at least 2 coats in directions perpendicular to each other.
• Under conditions of +5°C to +15°C temperature and above 60% relative humidity, applying at least 3 coats is recommended.
• Waiting time between coats: Minimum 8 hours.
• Wait at least 3 days before soil filling and 7 days for full performance.
• During application, the surface must be protected from rain, frost, and strong wind.
• Horizontal surfaces should have sufficient slope towards drainage points to prevent water accumulation.
• In areas exposed to pressurized water, consumption amount and film thickness should be increased.
• After full curing, mechanical protection (drainage board, geotextile, etc.) should be applied.

Technical Performance Summary

The specified values are obtained under laboratory conditions and may vary depending on site conditions.

Consumption, Packaging and Storage

Recommended Consumption Values:

• Vertical surfaces: 1.5 – 1.8 kg/m²
• Horizontal surfaces: 1.7 – 2.0 kg/m²

(Consumption may vary depending on surface absorption and required film thickness.)

Packaging:

• 25 kg plastic bucket

Technical Information:

• Color: Black
• Density: Approximately 1.20 ± 0.1 g/cm³
• Shelf life: 12 months (in unopened packaging, between +5°C and +25°C)
• Storage: Store in a cool, dry place protected from direct sunlight.

Frequently Asked Questions

1) Is it sufficient alone for underground foundation and curtain wall waterproofing?

Yes, it is suitable. However, mechanical protection should be applied after complete curing. In areas exposed to pressurized water, the membrane thickness should be increased.

2) Can it be used under ceramic tiles?

Yes. It can be applied before tile installation and provides strong adhesion performance beneath ceramic coverings.

3) Is it resistant to negative water pressure?

No. Different waterproofing systems should be preferred for applications exposed to negative water pressure.

4) When can backfilling or covering be performed?

Soil filling can be started after a minimum of 3 days, while full performance is achieved after 7 days (under conditions of 23°C temperature and 50% relative humidity).

5) Which equipment can be used for application?

It can be applied using a brush, roller, or airless spray machine. Short mixing before application is recommended.

Conclusion

KYK Megaİzo S804 is a reliable, flexible, and long-lasting waterproofing solution for underground and wet area applications. Thanks to its CB2 crack-bridging performance, W2A water tightness capability, and high chemical resistance, it provides effective protection for structures from foundations to terraces.

With proper surface preparation and correct layer application, it creates a durable barrier against water for many years.