• Item Name: LOCTITE® SI 5055™
• Manufacturer: Henkel
• Technologies: Alkoxy silicone, one-component, UV/visible light curable
• Color: Light yellow, transparent liquid
• Cure Type: Ultraviolet (UV) / Visible light
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
LOCTITE® SI 5055™ is a one-component, alkoxy-based silicone adhesive that cures via UV/visible light. It is a light yellow, transparent liquid designed for low-viscosity applications, forming a tough, transparent silicone rubber. Specifically developed for disposable medical devices, it delivers rapid functional strength, biocompatibility per ISO 10993 standards, and high performance in bonding, potting, coating, and sealing applications.
Assembly of disposable medical devices
Bonding, potting, coating, and sealing of UV-transparent substrates
High-performance adhesive applications requiring rapid curing and biocompatibility
Suitable for metals, glass, polycarbonate, PVC, PBT, ABS, and nylon
Uncured Material
| Property | Value |
|---|---|
| Specific Gravity | 0.98 |
| Viscosity (Brookfield, 25 °C) | 200–850 mPa·s |
| Tack Free Time (365 nm, 70 mW/cm²) | 30–120 s |
| Depth of Cure (60 s, 70 mW/cm², 365 nm) | ≥4 mm |
Cured Material (60 s UV/Visible, 24 h @ 22 °C / 50 % RH)
| Property | Value |
|---|---|
| Shore Hardness (A) | 45–65 |
| Elongation at Break | >80 % (161 % typical) |
| Tensile Strength | >6 N/mm² (9.3 N/mm² typical) |
| Compression Set | 7.9–92.5 % (depending on temperature) |
| Gas Permeability | He: 3.88×10⁻⁶, O₂: 2.11×10⁻⁶, CO₂: 1.40×10⁻⁵ cm²/sec/atm |
| Dielectric Breakdown | 15.3 kV/mm |
| Volume Resistivity | 1.10×10¹⁵ Ω·cm |
| Dielectric Constant | 2.7–2.8 |
| Lap Shear Strength | 1.3–4.5 N/mm² depending on substrate |
| Heat & Fluid Resistance | Durometer and strength retained with minor changes; some swelling in oils/ATF at high temperature |
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