Technical data sheet for Loctite SI5970 silicone adhesive, detailing physical, electrical and environmental properties.
The SI5970 silicone adhesive is a single‑component, RTV curing, thixotropic sealant designed for gasket applications in automotive engine oil environments. It cures at room temperature and offers excellent oil resistance, making it suitable for stamping metal covers and other high‑movement joints.
The sheet provides detailed specifications such as density, Shore A hardness, tensile strength, surface and volume resistivity, dielectric constant, and shear strength after 21 days of cure under specified temperature and humidity conditions. Storage recommendations and safety notes are also included. This manual is written in Chinese.
| Density at 25 °C | 1.38–1.44 g/cm³ |
|---|---|
| Shore A Hardness (ISO 868) | 44 |
| Tensile Strength (ISO 37) | ≥1.5 N/mm² |
| Surface Resistivity (IEC 60093) | 1.4 × 10¹⁶ Ω |
| Volume Resistivity (IEC 60093) | 1.8 × 10¹⁵ Ω·cm |
| Dielectric Constant (1 kHz) | 3.44 |
| Shear Strength after 21 days (ISO 4587, low‑carbon steel) | 1.3–2.0 N/mm² |
Store the product between 2 °C and 21 °C; temperatures outside this range may affect performance.
The substrate surface should be clean and free of oil before bonding.
Yes, excess adhesive can be wiped off with a non‑polar solvent.