LOCTITE SI 5040
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- One-Component Sealing System
- Non-Corrosive Sealing Formulation
- Self-Leveling Flowable Placement
Product Description
LOCTITE® SI 5040™ is a one-component alkoxy silicone RTV sealant designed for potting, coating, and sealing automotive, electronic, military, and industrial components. The self-leveling, non-corrosive formulation provides uniform cavity filling while maintaining flexibility, shock absorption, and environmental durability. After curing, it forms a resilient silicone elastomer that resists moisture, ozone, weathering, and harsh service environments while maintaining performance at temperatures up to 200°C.
Key Features & Benefits
- One-component RTV alkoxy silicone system.
- Non-corrosive curing mechanism.
- Self-leveling for uniform cavity fill.
- Excellent moisture, ozone and weather resistance.
- Provides flexibility and shock absorption.
- Suitable for potting, coating and sealing applications.
- Tested to MIL-A-46146B requirements.
Recommended Applications
- Electronic component potting.
- Protective conformal coating.
- Industrial sealing applications.
- Automotive component protection.
- Military and environmental sealing systems.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
AppearanceAppearance
Translucent milky white viscous liquidSpecific GravitySpecific Gravity
1.05Physical Properties
ViscosityViscosity
85,000 mPa.sAdditional Information
Technical Properties
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Technology | Silicone | — | RTV sealing and potting compound |
| Chemical Type | Alkoxy Silicone | — | Non-corrosive system |
| Appearance | Translucent Milky White Viscous Liquid | — | Uncured material |
| Specific Gravity | 1.05 | — | 25°C |
| Solids Content | ≥92 | % | Non-volatile content |
| Viscosity | 85,000 | mPa·s (cP) | Brookfield RVT, spindle 6, 2.5 rpm |
| Viscosity | 35,000 | mPa·s (cP) | Brookfield RVT, spindle 6, 20 rpm |
| Storage Requirement | 2 to 8 | °C | Recommended storage range |
Technical Properties
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Maximum Service Temperature | 200 | °C | Typical operating limit |
| Shore Hardness | ≥15 | Shore A | ISO 868 |
| Elongation at Break | ≥150 | % | ISO 37 |
| Tensile Strength | ≥1.0 | N/mm² | ISO 37 |
| Tear Strength | 17.5 | N/mm | ISO 34-1 Die B |
| Water Absorption | 0.05 | % | 24 h @ 23°C |
| Dielectric Breakdown Strength | 16 | kV/mm | IEC 60243-1 |
| Volume Resistivity | 7 × 10¹⁶ | Ω·cm | IEC 60093 |
| Lap Shear Strength (Steel to Glass) | 1.8 | N/mm² | 1 week cure @ 23°C |
| Lap Shear Strength (Glass to Glass) | 1.7 | N/mm² | 1 week cure @ 23°C |
