LOCTITE SI 598

Harmonization Code : 8001.20 | Unwrought tin: Tin alloys

LOCTITE SI 598 LOCTITE SI 598 LOCTITE SI 598 LOCTITE SI 598 LOCTITE SI 598 LOCTITE SI 598

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.

Product Family

LOCTITE SI 598

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Metallic black paste
Chemistry Type
Oxime silicone
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
1K
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.27 to 1.32
Physical Properties
Extrusion Rate
220 to 550 g/min
Tack-Free Time
≤25 minutes
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
≥325 %

Additional Information

Technical properties

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
Technical properties

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

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