• Item Name: LOCTITE® SI 5045™
• Manufacturer: Henkel
• Technologies: Silicone, Alkoxy
• Color: Translucent paste
• Cure Type: Room temperature vulcanizing (RTV)
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
LOCTITE® SI 5045™ is a one-component, alkoxy-based silicone sealant with room temperature vulcanizing (RTV) properties. It is a translucent paste designed for bonding, sealing, and coating. The product is non-corrosive, enhances load-bearing and shock-absorbing characteristics, and delivers high strength. Its non-slumping nature makes it ideal for reinforcing delicate components. LOCTITE® SI 5045™ resists weathering, moisture, and ozone, maintaining its performance in severe environments, and can be used in applications up to 200 °C.
Bonding, sealing, and coating of components
Military, automotive, and industrial applications
Reinforcing and strain-relieving delicate parts
High-strength applications requiring resistance to weathering, moisture, and ozone
Uncured Material
| Property | Value |
|---|---|
| Specific Gravity @ 23 °C | 1.14 |
| Solids/Non-Volatile Content | 92 % |
| Extrusion Rate (0.62 MPa, 15 s, 25 °C) | 40 g/min |
| Tack Free Time (23 °C / 50 % RH) | 5 h |
Cured Material (1 week @ 23 °C / 50 % RH)
| Property | Value |
|---|---|
| Shore Hardness (A) | 25 |
| Elongation at Break | 500 % |
| Tensile Strength | 3 N/mm² (430 psi) |
| Tear Strength | 40 N/mm (230 lb/in) |
| Coefficient of Thermal Expansion | 3×10⁻⁴ K⁻¹ |
| Thermal Conductivity | 0.2 W/(m·K) |
| Water Vapor Transmission Rate | 0.48 g/(h·m²) |
| Water Absorption (24 h) | 0.01 % |
| Electrical Properties | Dielectric breakdown: 18 kV/mm, Volume resistivity: 4×10¹⁵ Ω·cm, Dielectric constant: 3.0–3.1 |
| Peel Adhesion | Aluminum (primed) 13 N/mm (75 lb/in), Steel (primed) 8.7 N/mm (50 lb/in) |
| Heat Resistance (Cured @ 200 °C, 1 week) | Shore Hardness 45, Elongation 330 %, Tensile Strength 3 N/mm² |
| Hydrolytic Stability (Cured 28 days @ 95 °C / 98 % RH) | Shore Hardness 29, Elongation 500 %, Tensile Strength 5 N/mm² |
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