• Item Name: LOCTITE® SI 5088™
• Manufacturer: Henkel
• Technologies: Alkoxy silicone, Silicone technology
• Color: Straw colored liquid
• Cure Type: Ultraviolet (UV) light with secondary moisture cure
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
LOCTITE® SI 5088™ is a one-component, UV-curable alkoxy silicone adhesive in a straw-colored liquid form. It is thixotropic, minimizing migration after application, and develops secondary cure via moisture for shadowed areas. The product is designed for gasketing and sealing, providing enhanced flexibility to improve load-bearing and shock-absorbing properties.
Gasketing and sealing in industrial and general applications
Suitable for substrates requiring flexibility and shock absorption
Uncured Material
| Property | Value |
|---|---|
| Specific Gravity @ °C | 1.02 |
| Solids / Non-Volatile Content | ≥95% |
| Flash Point | See SDS |
| Viscosity, Brookfield RVT, 25 °C, Spindle 6, 2.5 rpm | 50,000–80,000 mPa·s (cP) |
| Cure Method | UV light; moisture for shadowed areas |
| Surface Tack Free Time | ~14 minutes |
| Depth of Cure (shadowed areas) | ≤6 mm (24 h) |
Cured Material (Cured 60 sec @ 40–70 mW/cm² + 3–7 days @ 22 °C / 50% RH)
| Property | Value |
|---|---|
| Coefficient of Thermal Expansion | 2.89×10⁻⁴ K⁻¹ |
| Water Absorption (24 h) | 0% |
| Shrinkage | 0% |
| Water Vapor Transmission Rate | 0.455 g/(h·m²) |
| Compression Set | 6–80% (22–100 °C, 70 h) |
| Dielectric Constant / Dissipation Factor | 100 Hz: 2.9 / 0.002, 100 kHz: 2.88 / 0.003 |
| Volume Resistivity | 8.3×10¹³ Ω·cm |
| Shore Hardness (Durometer A) | ≥25 |
| Elongation at break | ≥135% |
| Tensile Strength | ≥1 N/mm² (≥145 psi) |
| Tear Strength | ≥1.7 N/mm (≥9.7 lb/in) |
| Lap Shear Strength (various substrates) | 0.1–1.2 N/mm² (15–175 psi) |
| 180° Peel Strength | Aluminum / Steel: <1 N/mm (<5 lb/in) |
| Heat Aging (% initial strength at RT) | Maintains strength up to 5 weeks at 150–200 °C |
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