SikaSwell S-2

SIKASWELL S-2 – POLYURETHANE HYDROPHILIC SWELLABLE SEALANT

DESCRIPTION

SikaSwell S-2 is a hydrophilic sealant designed to swell upon contact with water, making it the perfect solution for sealing all types of construction joints and penetrations in concrete. This innovative product provides a reliable and permanent water-resistant barrier, ensuring the integrity of your construction projects.

APPLICATION

SikaSwell S-2 has a wide range of applications, making it a versatile choice for your construction needs:

• Sealing:
  • Construction joints
  • Pipe and steel work penetrations through walls and floor slabs
  • Around all types of penetrations and construction joints
  • Construction joints in cable ducts, etc.
• Fixing/Adhering Swellable Profiles:
  • SikaFuko Swell 1 Injection hoses
  • SikaSwell-A Profiles
  • SikaSwell-P Profiles

ADVANTAGES

SikaSwell S-2 comes with several notable advantages:

• Easy to apply
• Good adhesion to various substrates
• Optimized expansion rate, preventing damage to fresh concrete during curing
• Highly economical
• Swells in contact with water
• Permanently water-resistant
• Adaptable to fit many different types of detailing

PRODUCT INFORMATION

Here’s a quick overview of the essential product information for SikaSwell S-2:

• Composition: 1-part polyurethane, moisture curing
• Packaging: 600 ml unipacs (20 unipacs/box, 48 boxes/pallet)
• Appearance/Color: Oxide red
• Shelf life: 9 months from the date of production
• Storage conditions: +5°C to +25°C in original, unopened, undamaged sealed packaging
• Density: 1.33 kg/l (at 23°C)

TECHNICAL SPECIFICATIONS

Property	Value
Shore A Hardness Swollen	> 10
Non-swollen	40-60
Change of Volume 1 day in tap water	< 25%
7 days in tap water	< 100%
Swelling in salty water	Reduced and delayed

CONSTRUCTION INSTRUCTIONS

Ensuring the proper installation of SikaSwell S-2 is essential for achieving effective and long-lasting results. Follow these detailed construction instructions to ensure a successful application:

1. PREPARE THE SUBSTRATE:

• Before applying SikaSwell S-2, the substrate must be sound, clean, and free from all surface contaminants.
• For existing concrete, remove any loose particles, release agents, laitance, paint, rust, and other materials that may not adhere well.
• Freshly cast concrete should be compacted thoroughly to ensure a dense surface without any honeycombing or voids.
• In cases where the concrete surface is excessively rough, it’s recommended to smooth the surface with a batten or a similar tool in the areas where the sealant will be applied.

2. APPLICATION METHOD / TOOLS:

• Sealant Application:
  • Apply SikaSwell S-2 in a narrow bed with a size of approximately 5 mm onto the prepared substrate.
  • Extrude a sufficient quantity to level the roughness of the substrate effectively.
• Profiles and Injection Hoses:
  • For profiles (SikaSwell-A and SikaSwell-P) and SikaFuko Swell 1 Injection Hoses, press them into the freshly applied SikaSwell S-2 until a small quantity extrudes from both sides of the profile or hose, ensuring a full surface bond.
  • Profiles must be placed within a maximum of 30 minutes.
  • Allow SikaSwell S-2 to harden for 2-3 hours before placing concrete.
  • Protect the SikaSwell S-2 profiles against water, such as rain, until the concrete is placed.

3. BURIED SEALANT FOR CONSTRUCTION JOINTS:

• Use a triangular nozzle or cut the nozzle to achieve a regular triangular extrusion section.
• Apply SikaSwell S-2 according to the following guidelines based on the structure thickness:
  • For structures less than 30 cm thick, use a 15 mm triangular section.
  • For structures between 30-50 cm thick, use a 20 mm triangular section.
• Place SikaSwell S-2 in the center of the concrete section.
• Protect the SikaSwell S-2 against water, such as rain, until the concrete is placed.

4. CLEANING OF EQUIPMENT:

• After use, clean all tools and application equipment immediately with Sika Colma-Cleaner.
• Any hardened material can only be removed through mechanical means.

5. IMPORTANT CONSIDERATIONS:

• Ensure a full and continuous contact between the SikaSwell S-2 profiles and the substrate is achieved.
• The minimum cover on both sides of the sealant should be 10 cm for reinforced concrete and 15 cm for unreinforced concrete.
• For pouring heights less than 50 cm, allow the sealant to harden for 2-3 hours before further construction. If the pouring height is greater than 50 cm, the SikaSwell S-2 must harden for at least 2 days.
• SikaSwell S-2 expands in contact with water, and this expansion is not immediate; it may take a few hours. Avoid leaving SikaSwell S-2 submerged in standing water for an extended period (maximum 24 hours, allowing drainage).
• Do not use SikaSwell S-2 for movement joints.
• If the water level suddenly increases, the watertightness of joints will be achieved when SikaSwell S-2 has swollen.
• In a completely dry state, SikaSwell S-2 shrinks to its original dimensions before expanding again upon contact with water.
• While SikaSwell S-2 has been tested for water pressures up to 5 bar, it is not recommended for sealing against water pressures higher than 2 bar due to the limited sealing distance. For pressures exceeding 2 bar, consider using SikaFuko Swell 1 Injection Hoses or other supplementary sealing measures.

Follow these construction instructions diligently to ensure the successful application of SikaSwell S-2, maintaining the integrity and watertightness of your construction projects.