LOCTITE SI 598
Harmonization Code : 8001.20 | Unwrought tin: Tin alloys
Main features
- Wide-Temperature Automotive Gasketing
- High-Elongation Cured Seal
- Automotive Fluid-Resistant Gasketing
Product Description
LOCTITE SI 598 Black RTV Silicone Gasket Maker is a one-part, thixotropic oxime silicone paste for forming replacement gaskets and dressing existing gaskets. Atmospheric moisture cures the metallic-black material into a tough, flexible rubber that resists aging, weathering, thermal cycling, and contact with motor oil, transmission fluids, alcohol, and antifreeze solutions. It typically becomes tack-free within 25 minutes at 25 deg C and develops full performance over 72 hours. The cured sealant provides at least 325% elongation and is typically used from -54 to 260 deg C. It is not recommended for gasoline-contact parts or cylinder-head gaskets.
Key features
- Wide-temperature gasketing: Typical gasket applications span -54 to 260 deg C.
- High-elasticity cured seal: At least 325% elongation supports flexible formed-in-place gaskets.
- Automotive fluid resistance: Retains effective properties with motor oil, transmission fluids, alcohol, and antifreeze solutions.
Applications
Applications include oil pans, transmission pans, valve covers, valves and guides, timing gear covers, differential covers, replacement gaskets, and gasket dressing.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Additional Information
As-supplied properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Metallic black paste | As supplied | |
| Specific gravity | 1.27 to 1.32 | 25 deg C | |
| Extrusion rate | 220 to 550 | g/min | Semco cartridge, 0.62 MPa, 15 s, 25 deg C |
| Flow | 13 or less | mm | ISO 7390, after 3 min |
Cured and in-service properties
Mechanical properties apply after 7 days at 25 deg C and 50 +/- 5% RH.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Tensile strength | At least 1.3 | N/mm^2 | ISO 37; cured 7 days at 25 deg C / 50 +/- 5% RH |
| Elongation | At least 325 | % | ISO 37; cured 7 days at 25 deg C / 50 +/- 5% RH |
| Shore hardness | 26 to 40 | Shore A | ISO 868; cured 7 days at 25 deg C / 50 +/- 5% RH |
| Typical operating range | -54 to 260 | deg C | Gasketing applications |
| Automotive fluid resistance | Effective properties retained | Contact with motor oil, transmission fluids, alcohol, and antifreeze solutions; not recommended for gasoline |
