SikaSwell A-2005 – Rouleau de 20m – Rouge  

The SikaSwell A-2005 is a water-swelling rubber sealing profile specifically designed to ensure water-tightness in construction joints within concrete structures. This product expands upon contact with water, creating a waterproof barrier that prevents water from entering joints or cracks. Primarily used in underground construction projects, tunnels, water basins, and structures exposed to high water pressures, SikaSwell A-2005 offers a reliable solution for applications requiring durable and effective water sealing.

Key Features of SikaSwell A-2005

• Water-Swelling Ability: The SikaSwell A-2005 profile expands significantly when exposed to water, creating a waterproof barrier by increasing in volume. This expansion fills gaps or voids in joints, ensuring water-tightness even under high pressure.
• Elasticity and Flexibility: Made from hydrophilic rubber, this product is flexible enough to adapt to concrete movements without cracking or losing adhesion. This makes it ideal for applications in environments with frequent structural movement.
• Ease of Installation: Available in rolls or strips, SikaSwell A-2005 can be easily cut and adjusted to fit joint dimensions. Its installation is quick and requires minimal preparation.
• Excellent Adhesion: It adheres firmly to concrete and other construction materials, ensuring a secure and waterproof integration into the structure. This adhesion is reinforced by using SikaSwell S-2 adhesive, specially designed for this product.
• Durability and Chemical Resistance: Resistant to numerous chemicals found in wastewater or industrial environments, this profile ensures long-lasting protection under various conditions.
• High Water Pressure Resistance: Capable of withstanding significant water pressures, SikaSwell A-2005 is designed for applications where water presence is constant or intermittent, making it ideal for foundations and basements exposed to high water pressures.

Benefits of SikaSwell A-2005

SikaSwell A-2005 offers numerous benefits, making it a popular choice for water-sealing projects in concrete structures:

• Active Sealing: Unlike traditional sealants that rely on a passive barrier, SikaSwell A-2005 is an active sealing product that expands upon contact with water to fill gaps. This feature ensures a seal even if the concrete has micro-cracks.
• Simple and Fast Installation: Its application does not require complex tools or extensive concrete preparation, reducing installation time and cost.
• Adaptability: Thanks to its elasticity and ability to adjust to structural movements, SikaSwell A-2005 can be used in various types of construction joints without risk of deterioration.
• Environmental Standards Compliance: Designed to withstand harsh environmental conditions without releasing toxic substances, this product is safe for the environment and on-site workers.
• Resistance to Shrinkage and Resilience: In dry conditions, the profile contracts but quickly regains its swelling capacity when re-exposed to water, ensuring continuous protection even after multiple wetting and drying cycles.

Common Applications of SikaSwell A-2005

SikaSwell A-2005 is commonly used in projects requiring joint sealing in concrete, such as:

• Construction Joints in Basements and Foundations: Its ability to withstand high water pressures makes it ideal for underground construction joints frequently exposed to water infiltration.
• Water Retention Structures: Used in pools, reservoirs, retention basins, and treatment plants, SikaSwell A-2005 prevents leaks and infiltration in structures with constant water contact.
• Underground Works and Infrastructure: In tunnels, underground pipes, parking garages, and retaining structures, it protects against moisture and water infiltration.
• Buildings Exposed to Weather and Flooding: SikaSwell A-2005 is also used to seal joints in structures in areas prone to heavy rainfall or flood risks.

Application Method for SikaSwell A-2005

1. Surface Preparation: Before application, ensure the surface is clean, dry, and free of dust, oil, and other contaminants for optimal adhesion.
2. Adhesive Application (optional but recommended): For optimal attachment, it is recommended to apply SikaSwell S-2 adhesive on the concrete surface. This reinforces adhesion and ensures the profile stays in place during concrete pouring.
3. Profile Placement: Place SikaSwell A-2005 directly on the designated area, pressing firmly onto the adhesive. The ends should be positioned end-to-end without gaps to ensure a continuous seal.
4. Concrete Pouring: Once the profile is in place, concrete can be poured. The profile remains in place during concrete curing, ready to ensure water-tightness upon exposure to water.

Usage Precautions and Recommendations

• Avoid Premature Water Exposure: The profile should not be exposed to water before concrete pouring, as it could begin swelling prematurely and compromise effectiveness.
• Ensure Good Contact with Concrete: During installation, make sure the profile is in firm contact with the concrete surface for optimal sealing.
• Storage Temperature: SikaSwell A-2005 should be stored in a dry place at a moderate temperature to preserve its properties.

Main Technical Specifications of SikaSwell A-2005

• Material: Hydro-swelling rubber specially formulated to expand upon contact with water.
• Swelling Capacity: SikaSwell A-2005 can increase in volume by up to 200% (relative to its initial size) when exposed to water, ensuring effective sealing by filling gaps and cracks.
• Dimensions: Available as profiles (usually rectangular or round) to fit different joint configurations. Standard dimensions are 20 mm x 5 mm, though other sizes may be available to meet project needs.
• Color: Typically red, allowing for easy identification during installation and inspection.
• Initial Adhesion: Though it can be applied directly in joints, it is often used with SikaSwell S-2 adhesive to ensure perfect holding before concrete pouring.
• Maximum Water Pressure Resistance: Capable of withstanding water pressures up to 5 bars, equivalent to a 50-meter water column, making it particularly suited for underground infrastructure and humid environments.
• Swelling Time: The profile begins to swell quickly upon moisture exposure, achieving full swelling in approximately 24 to 48 hours, depending on ambient humidity and temperature.
• Resistance to Wetting and Drying Cycles: SikaSwell A-2005 can undergo multiple swelling and contraction cycles without loss of performance, essential for environmen
• ts that may temporarily dry out.
• Application Temperatures: Suitable for application in temperatures from +5 °C to +40 °C. For lower temperatures, consult the manufacturer for specific application ins
• tructions.
• Durability: High resistance to chemicals present in water (notably salts and dissolved minerals), allowing SikaSwell A-2005 use in industrial and wastewater treatment facilities.
• Standards Compliance: Complies with international standards for concrete sealing products, including applicable ISO standards.
• Storage: Should be stored in a dry location at temperatures from +5 °C to +35 °C, protected from humidity to preserve its hydro-swelling properties.

In summary, SikaSwell A-2005 stands out for its high swelling capacity, durability against water and chemicals, and resistance to high water pressures. It is designed to provide durable water-tightness and adapts to the structural movements of concrete buildings, even in demanding environments.

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