Item Name: LOCTITE® SI 5145
Manufacturer: Henkel
Technologies: Alkoxy silicone
Color: Translucent liquid
Cure Type: Room temperature vulcanizing (RTV)
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.
LOCTITE® SI 5145 is a one-component alkoxy silicone adhesive designed for bonding, sealing, and coating applications. It cures at room temperature (RTV) without mixing, providing a translucent, non-corrosive, and highly flexible material. The product enhances load-bearing and shock-absorbing characteristics, resists weathering, moisture, and ozone, and maintains performance in extreme conditions from -50°C to 200°C. It is specifically formulated for electronic devices in military, automotive, and industrial sectors, offering strain relief for delicate components.
Bonding, sealing, or coating of electronic components
Reinforcing and strain-relieving delicate parts
Use in environments exposed to weathering, moisture, and ozone
Continuous service in temperatures ranging from -50°C to 200°C
Suitable for military, automotive, and industrial electronic devices
| Property | Value |
|---|---|
| Specific gravity @ 25°C | 1.14 |
| Solids/non-volatile content, % | ≥92 |
| Extrusion rate (Semco cartridge, 0.62 MPa, 25°C) | ≥40 g/min |
| Tack-free time @ 25°C / 50±5% RH | ≤5 hours |
| Property | Value |
|---|---|
| Coefficient of thermal expansion, K⁻¹ | 2.8×10⁻⁴ |
| Coefficient of thermal conductivity, W/(m·K) | 0.2 |
| Water vapor transmission rate, g/(h·m²) | 0.48 |
| Water absorption, % (24h in water @ 23°C) | 0.01 |
| Shore hardness, Durometer A | ≥25 |
| Elongation, % | ≥500 |
| Tensile strength, N/mm² (psi) | ≥3.4 (≥493) |
| Tear strength, N/mm (lb/in) | 40 (230) |
| Dielectric breakdown strength, kV/mm | 18 |
| Volume resistivity, Ω·cm | 4×10¹⁵ |
| Dielectric constant / dissipation factor | 100 Hz: 3.0 / 0.006 1 MHz: 3.1 / 0.01 |
| Peel adhesion (pli method), N/mm (lb/in) | Aluminum: 13 (75) Steel: 8.7 (50) |
| Heat resistance (1 week @ 200°C) | Shore hardness: 45 Elongation: 330% Tensile strength: 3 N/mm² (435 psi) |
| Hydrolytic stability (28 days @ 95°C / 98% RH) | Shore hardness: 29 Elongation: 500% Tensile strength: 5 N/mm² (725 psi) |
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