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Use Sikaflex®-11 FC for: Sealing joints in concrete, wood, and metal, and bonding floor moldings, skirting boards, and acoustic ceiling tiles.
Sikaflex®-11 FC is a versatile, one-component polyurethane sealant and adhesive designed for professional use. Its advanced formulation delivers a fast cure rate and exceptional adhesion to a wide range of substrates, including concrete, brick, metal, and wood. This product is perfect for Australian tradespeople needing a reliable solution for both sealing and bonding applications, offering long-lasting elasticity and resistance to weathering and water.
Key Features of Sikaflex®-11 FC
- Dual Functionality: Acts as both a sealant and adhesive, reducing the need for multiple products on site.
- Fast Cure Rate: Speeds up project completion, allowing for quicker over-painting and use.
- Excellent Adhesion: Bonds strongly to various materials, ensuring long-lasting performance.
- Weather and Water Resistance: Provides durable protection against harsh Australian weather conditions.
- High Elasticity: Accommodates joint movement, preventing cracks and failures.
Technical Overview
Sikaflex®-11 FC is formulated with a moisture-cured polyurethane that delivers a Shore A hardness of 40-45, providing a balance of flexibility and durability. Its tensile strength of approximately 1.55 N/mm² and elongation at break of 600% ensure robust performance in demanding applications.
Chemical Properties: One-component polyurethane that cures with atmospheric moisture, providing a flexible and durable seal.
Application Temperature Range: +5 °C to +35 °C (41 °F to 95 °F), ensuring reliable application in typical Australian climate conditions. Service temperature is -20 °C to +70 °C.
Application Information
- Required Tools: Standard sealant gun, masking tape, backing rods, Sika® Tooling Agent N.
- Trade-Specific Tips: Ensure surfaces are thoroughly clean and primed as needed. Use backing rods to control sealant depth and prevent three-sided adhesion.
- Common Issues and Solutions: Bubbling can occur if moisture is trapped; ensure proper substrate preparation and avoid applying in high humidity.
Storage and Shelf Life
- Storage Requirements: Store in dry conditions, protected from direct sunlight, between +5 °C and +25 °C.
- Shelf Life Information: 12 months from the date of production in original, sealed packaging.
- Temperature Considerations: Avoid storing in extreme temperatures to maintain product integrity.
Certifications
- ASTM C920: Meets requirements for elastic joint sealants.
Frequently Asked Questions About Sikaflex®-11 FC
Q: Can Sikaflex®-11 FC be used for underwater applications?
A: For total water immersion applications, allow a 5-day cure at standard conditions. Avoid long term exposure to high levels of chlorine. Do not use in swimming pools.
Q: How long does Sikaflex®-11 FC take to cure?
A: It takes 1 to 2 hours to become tack-free, depending on climate conditions, and 3 to 5 days for a final cure.
Q: What materials does Sikaflex®-11 FC adhere to?
A: It adheres to most common construction materials, including concrete, brick, ceramics, glass, metals, and wood. Primers may be needed for some substrates.
Q: Can Sikaflex®-11 FC be painted?
A: Yes, it can be overpainted with most conventional paints. However, preliminary tests are recommended to ensure compatibility. Best results are achieved after a full cure.
Q: What safety precautions should I take when using Sikaflex®-11 FC?
A: Wear appropriate PPE, such as gloves and eye protection. Ensure adequate ventilation. Clean tools with Sika® Remover-208 immediately after use.
Use Sikaflex®-11 FC for:
- Sealing joints in concrete and masonry structures.
- Bonding skirting boards and floor moldings.
- Sealing metal fabrications and bolted lap joints.
- Adhering acoustic ceiling tiles.
- General construction sealing and bonding.
Why Use Sikaflex®-11 FC:
- Provides a durable and flexible seal, preventing water ingress and air leakage.
- Offers excellent adhesion to a wide range of building materials, reducing the need for multiple products.
- Cures quickly, allowing for faster project completion and reduced downtime.
- Resists weathering and water, ensuring long-term performance in various environmental conditions.
- Can be overpainted, allowing for seamless integration with existing finishes.
How to apply Sikaflex®-11 FC:
- Prepare the substrate: Clean and prime as needed.
- Insert backing rod: To control sealant depth.
- Apply sealant: Extrude into the joint, ensuring full contact.
- Finish: Tool the sealant with Sika® Tooling Agent N.
Sikaflex®-11 FC limitations:
- Not for use in expansion joints.
- Do not use on bituminous substrates, natural rubber, or EPDM rubber.
- Avoid exposure to high levels of chlorine.
- White colour can discolour when exposed to UV light.
Safety precautions when using Sikaflex®-11 FC:
- Personal Protective Equipment: Wear gloves, eye protection, and appropriate respiratory protection in poorly ventilated areas.
- Ventilation: Ensure adequate ventilation during application and curing.
- Handling: Avoid skin and eye contact. Clean tools and skin with Sika® Remover-208.
- Disposal: Dispose of cured material according to local regulations.
Sikaflex®-11 FC can be used on the following substrates:
- Concrete: Prime with Sika® Primer-3 N for optimal adhesion.
- Metal: Use Sika® Aktivator-205 and/or Sika® Primer-3 N depending on the type of metal.
- Wood: Ensure the wood is clean and dry.
- Ceramics: Clean and slightly roughen the surface for best results.
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