Sikaflex®-227
Sikaflex®-227 is a one-component polyurethane sealant that cures via atmospheric moisture to form a durable, elastic bond. It’s engineered for use in automotive body sealing, but is highly versatile across diverse substrates—offering fast skinning, excellent adhesion, low odour, and paintable finish.
Key Features
Fast skin formation and minimal sag, enabling overhead application.
Paintable and sandable, with weather and age resistance.
Silicone-free and low odor, ideal for sensitive environments.
Strong adhesion to a wide variety of materials—metals, primers, painted plastics, ceramics—often without primer.
Provides elastic sealing with excellent cut and tear resistance, making it ideal for expanding and contracting joints.
Technical Specifications | |
| Property | Value |
| Base | 1-component polyurethane (moisture-curing) |
| Colors Available | Black, White, Aluminum Gray, etc. |
| Density (Uncured) | ~1.3 kg/L (varies slightly by color) |
| Application Temp | +5 °C to +35 °C |
| Skin Time | ~40 minutes at 23 °C / 50% RH |
| Shrinkage | ~5% |
| Shore A Hardness | ~40 |
| Tensile Strength | ~1.6–1.7 MPa (230–245 psi) |
| Elongation at Break | ~600% |
| Tear Propagation Resistance | ~6 N/mm |
| Service Temp Range | –50 °C to +90 °C (continuous) |
| Shelf Life | ~9–12 months for cartridges; ~6 months for drums/pails (storage <25 °C) |
Applications
Ideal for flexible sealing and light bonding tasks including:
Automotive: seam sealing, body repairs, and vibration damping.
Construction & Transport: sealing seams in trailers, RVs, HVAC units, metal roofs, and window perimeters.
General Industry: flexible sealing of metal, plastic, and painted surfaces.
Safety & Handling
Ventilation: Use in well-ventilated areas to minimize inhalation exposure.
PPE: Wear chemical-resistant gloves and eye protection.
Avoid Skin/Eye Contact: Clean spills promptly, and avoid ingestion or inhalation.
Fire Safety: Store away from heat and open flames.
Surface Preparation: Ensure substrates are clean, dry, and free from oils. Refer to Sika’s pre-treatment guides.
