Sika Sikaflex 11FC+
Sika Sikaflex 11FC+
Sikaflex 11FC+ — Multipurpose Elastic Adhesive and Joint Sealant
Sikaflex®-11 FC+ is a 1-part, multipurpose elastic adhesive and joint sealant based on i-Cure polyurethane technology. It bonds and seals most construction material substrates for both internal and external use, with ±35% movement capability and approximately 700% elongation at break.
Key Features
- Dual function — adhesive and sealant in one product
- ±35% movement capability (ASTM C 719)
- ~700% elongation at break
- Bonds to most substrates without surface pre-treatment
- Good mechanical and weathering resistance
- Service temperature: -40°C to +80°C
- Very low emissions — GEV-Emicode EC1PLUS, LEED v4 EQc 2
- CE marked: EN 15651-1 (facade joints) and EN 15651-4 (pedestrian walkway joints)
Applications
- Adhesive: Bonding concrete, masonry, reconstituted/cast stone, ceramic, wood, metal, and glass
- Sealant: Sealing vertical and horizontal joints — facade panels, window/door perimeters, expansion joints, pedestrian walkways
- Suitable for both internal and external use
Technical Specifications
| Property | Value |
|---|---|
| Chemical Base | i-Cure technology polyurethane |
| Components | 1-part, ready to use |
| Density | ~1.35 kg/L |
| Shore A Hardness (28 days) | ~37 |
| Tensile Strength | ~1.5 N/mm² |
| Elongation at Break | ~700% |
| Movement Capability | ±35% |
| Elastic Recovery | ~80% |
| Tear Propagation Resistance | ~8.0 N/mm |
| Service Temperature | -40°C to +80°C |
| Skin Time | ~70 min (+23°C / 50% r.h.) |
| Curing Rate | ~3.5 mm / 24 hours (+23°C / 50% r.h.) |
| Sag Flow | ~1 mm (20 mm profile, +23°C) |
| Ambient / Substrate Temp | +5°C to +40°C (min. +3°C above dew point) |
| Colour | Black, Concrete grey |
| Packaging | 600 ml cylindrical foil pack (20 per box) |
| Shelf Life | 15 months from date of production |
| Storage | Unopened, dry, +5°C to +25°C |
Yield per 600 ml Foil Pack (Sealing)
| Joint Width (mm) | Joint Depth (mm) | Joint Length (m) |
|---|---|---|
| 10 | 10 | 6.0 |
| 15 | 12 | 3.2 |
| 20 | 17 | 1.8 |
| 25 | 20 | 1.2 |
| 30 | 25 | 0.8 |
Important Limitations
- Not for permanent water immersion or joints under water pressure
- Not for swimming pools
- Not for structural bonding
- Not for trafficable floor joints
- Not for bituminous substrates, natural rubber, or EPDM
- Not for PE, PP, PTFE (Teflon), or certain plasticised synthetic materials
- Not for sanitary joints (use dedicated sanitary sealant)
FAQ
What is the movement capability of Sikaflex 11FC+?
±35% per ASTM C 719. This means a 10 mm wide joint can accommodate ±3.5 mm of repeated movement without adhesion loss or cracking. Elongation at break is approximately 700%.
How long does Sikaflex 11FC+ take to cure?
At +23°C and 50% relative humidity, skin forms in approximately 70 minutes and the curing rate is about 3.5 mm per 24 hours. A 10 mm deep joint takes approximately 3 days to fully cure.
Does Sikaflex 11FC+ require a primer?
For most common substrates (concrete, masonry, ceramic, metal, wood), no primer is needed. However, preliminary adhesion trials are recommended before full application. For reconstituted or cast stone, contact Sika Technical Services first.
