Sika® Igolflex-205 | Cement and Bitumen Rubber-Based Waterproofing Material

Sika® Igolflex-205 is a high-performance, two-component waterproofing material based on cement and bitumen rubber technology. The first component consists of liquid bitumen rubber, while the second component contains reactive powder that provides fast curing.

Thanks to its special formulation, the product becomes ready for use in a short time and creates a durable waterproofing layer even under challenging climatic conditions. The product is developed by Sika, a globally recognized manufacturer in the field of construction chemicals.

Application Areas

Sika® Igolflex-205 offers a wide range of applications in both new construction projects and renovation works.

Main application areas include:

• Waterproofing of foundation walls and underground structural elements
• Protective coating beneath screeds in balconies, terraces, and wet areas
• Creating a moisture and damp-proof barrier
• Bonding lightweight thermal insulation boards
• Protection against negative water pressure in reinforced concrete structures

With its versatile usage, Sika® Igolflex-205 provides a professional waterproofing solution that helps extend the service life of buildings.

Product Features and Advantages

Sika® Igolflex-205 provides the following performance benefits:

• Remains stable on vertical surfaces without sagging
• Can be applied on dry and slightly damp surfaces
• Easy application by trowel, brush, or spray equipment
• Flexible and durable structure thanks to bitumen rubber technology
• Forms a water-resistant film layer through fast curing
• Provides strong adhesion and moisture resistance with cement additives
• Suitable for service temperatures between –20 °C and +60 °C

Technical Properties

• Chemical structure: Bitumen rubber + reactive powder
• Packaging: 32 kg set (24 kg liquid + 8 kg powder)
• Mixed density: ~1.06 kg/L
• Solid content: ~65%
• Application temperature: +5 °C to +35 °C
• Drying time: Approximately 3 days
• Consumption: ~1.1 kg/m²/mm
• Service temperature: –20 °C to +60 °C

These properties demonstrate that Sika® Igolflex-205 provides a durable waterproofing coating with strong adhesion performance.

Application Guidelines

Surface Preparation

The application surface must be completely cleaned from:

• Dust
• Oil
• Dirt
• Loose particles

Damaged areas should be repaired with suitable repair mortars before application. A primer is recommended on highly absorbent surfaces to improve adhesion performance.

Application

The material can be applied using:

• Trowel
• Brush
• Spray equipment

A waiting period of approximately 24 hours should be allowed between coats.

Application requirements:

• Minimum thickness per coat: 1 mm
• Total recommended thickness: 2–6 mm
• Protect the applied surface from rain and frost for at least 72 hours after application

Consumption Rates

Standard waterproofing applications:

• Approximately 1.1 kg/m²/mm

Bonding thermal insulation boards:

• Approximately 2.0 kg/m²

Important Application Considerations

• Do not apply under direct sunlight.
• Do not use below +5 °C or during rainy weather conditions.
• Do not add any external materials to the product.
• The coating must be protected from water and frost until fully cured.

Conclusion

Sika® Igolflex-205 combines cement and bitumen rubber technologies to provide a flexible and durable waterproofing solution.

Its non-sagging structure on vertical surfaces and wide application range make it suitable for various projects, from foundation waterproofing to wet area protection.

Developed for professional applications, Sika® Igolflex-205 helps protect structures against moisture and water penetration for many years with reliable performance.

Frequently Asked Questions (FAQ)

Where can Sika® Igolflex-205 be used?

It is suitable for waterproofing applications in foundations, basements, balconies, terraces, and wet areas.

At what temperatures should it be applied?

It is recommended to apply the product at ambient temperatures between +5 °C and +35 °C.

How long does it take to dry?

Drying time is approximately 3 days depending on environmental conditions.

Does it sag on vertical surfaces?

No. It maintains stability on vertical surfaces and forms an even waterproofing layer.

Is primer required?

Primer application is recommended on porous and highly absorbent surfaces to improve adhesion.