LOCTITE SI 5990 — Silicone Gasketing Compound
LOCTITE SI 5990 is a one-component, copper-colored, thixotropic silicone gasketing compound for gasketing and sealing. The product cures upon exposure to atmospheric moisture (RTV) and is formulated to adhere to a wide range of substrates, including metals and plastics. LOCTITE SI 5990 is non-corrosive and designed to fill larger gaps when applied.
Features and Benefits
- One-component, moisture-curing silicone (RTV).
- Thixotropic consistency reduces migration after application.
- Copper-colored paste in uncured state.
- Formulated for gasketing, sealing, and electrical insulation.
- Suitable for typical applications up to 350 °C.
Typical Applications
The datasheet clearly states that LOCTITE SI 5990 is used for gasketing and sealing as well as for electrical insulation. The product is used where a thixotropic, non-corrosive silicone gasket is required and where temperature resistance up to 350 °C is necessary.
Documentation
Specifications
- Product Name: LOCTITE SI 5990
- Manufacturer: LOCTITE
- Part Number: 2064072
- Packing Size (stated): 300 ml standard cartridge
- Technology/Chemical Type: Silicone
- Appearance (uncured): Copper paste
- Components: One component
- Thixotropic: Yes (reduced migration after application)
- Curing: Room Temperature Vulcanizing (moisture curing)
- Application: Gasketing and sealing; electrical insulation
- Typical Application Temperature: Up to 350 °C
- Specific Gravity @ 22 °C: 1.04
- Extrusion (Semco cartridge) ≥275 g/min (0.62 MPa, 22 °C, 15 s)
- Tack free time @ 22 °C / 50±5 % RH: 40 min
- Skin over time: 25 min
- Shore Hardness (ISO 868, Durometer A): 27
- Elongation (ISO 37): 270 %
- Tensile Strength (ISO 37): 1.9 N/mm² (275 psi)
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