Loctite 598 Black RTV Silicone Gasket Maker 95g

$27.00

Inc. GST

Available

Loctite 598 (Henkel data sheet name: Loctite SI 598) is a one-component, metallic black, oxime silicone. It cures at room temperature on exposure to moisture.

Henkel lists it for oil pans, transmission pans, valve covers, valves and guides, timing gear covers and differential covers, and for gasket replacement or gasket dressing. This is the 95 g pack.

Where this product is used

Oil pans and transmission pans
Valve covers and timing gear covers
Valves and guides
Differential covers
Gasket replacement
Gasket dressing

Features

One component, no mixing; metallic black oxime silicone paste
Thixotropic paste
Henkel states it resists ageing, weathering and thermal cycling without hardening, shrinking or cracking
Retains properties with motor oil, transmission fluids, alcohol and antifreeze solutions
No acetic odour
Tack-free in 25 minutes or less at 25 °C and 50% RH
Typical operating range -54 °C to 260 °C

Key specifications

Specification	Detail
Chemical type	Oxime silicone (silicone technology)
Colour	Metallic black paste (uncured)
Cure	One component, room temperature vulcanising (RTV), moisture cure
Specific gravity (25 °C)	1.27 to 1.32
Extrusion rate (Semco cartridge, 0.62 MPa, 15 s, 25 °C)	220 to 550 g/min
Tack-free time (25 °C, 50 ± 5% RH)	25 minutes or less
Full performance properties	Develop over 72 hours
Hardness (ISO 868 Shore A, 7 days, 25 °C, 50% RH)	26 to 40
Elongation (ISO 37, 7 days, 25 °C, 50% RH)	325% or more
Tensile strength (ISO 37, 7 days, 25 °C, 50% RH)	1.3 N/mm² or more (190 psi)
Temperature	-54 °C to 260 °C (typical operating range)
Storage	8 °C to 21 °C, unopened, dry
Technical data sheet	Henkel TDS November 2018

Selecting the right option

For a blue oxime silicone flange sealant see Loctite 587 Blue Maxx Silicone Flange Sealant 300ml; for a red acetoxy silicone for high temperature sealing see Loctite 596 Superflex RTV High Temperature Silicone Sealant Red; for a copper-coloured, non-corrosive silicone see Loctite 5920 Copper Maxx Silicone 85g. Henkel does not recommend 598 as a cylinder head gasket.

Using it

Surfaces should be clean and grease-free. Mate the parts within a few minutes of dispensing.

Tack-free time is 25 minutes or less at 25 °C and 50 ± 5% RH. Full performance properties develop over 72 hours, and the cured values on the data sheet are measured after 7 days at 25 °C and 50% RH.

Excess wipes off with non-polar solvents. Henkel lists volumetric dispensing for full-automatic use.

Storage and handling

Store unopened in a dry location, optimally between 8 °C and 21 °C. Storage below 8 °C or above 28 °C can adversely affect the properties of the product. Henkel does not state a shelf life.

Limits and safety

Not recommended for parts in contact with gasoline, for pure oxygen or oxygen-rich systems, as a sealant for chlorine or other strong oxidising materials, or as a cylinder head gasket or head gasket sealant. Read the safety data sheet before use.

Frequently asked questions

What temperature range does Loctite 598 handle?

Henkel gives a typical operating range of -54 °C to 260 °C.

How long does Loctite 598 take to cure?

Tack-free in 25 minutes or less at 25 °C and 50% RH. Full performance properties develop over 72 hours.

Can Loctite 598 be used as a cylinder head gasket?

No. Henkel states it is not recommended as a cylinder head gasket or head gasket sealant, nor for parts in contact with gasoline.

Where is Loctite 598 used?

Typical applications are oil pans, transmission pans, valve covers, valves and guides, timing gear covers and differential covers.

Does Loctite 598 smell of vinegar?

Henkel lists it as having no acetic odour.

Does Loctite 598 have approvals?

The current Henkel data sheet lists no approvals; contact AIMS if you need a certificate for a specific application.

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