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LOCTITE® SI 5926™ – Oxime silicone gasket maker – Automotive flexible flange sealing

  • Item Name: LOCTITE® SI 5926™
  • Manufacturer: Henkel Corporation
  • Product category: Sealing adhesive (gasketing)
  • Technologies: Acetoxy silicone; one-component, moisture-curing RTV formulation
  • Applications: Used for gasket replacement or dressing in automotive applications such as valve covers, timing gear covers, and oil pans.
  • Color: Blue paste
  • Cure type: Room temperature vulcanizing (RTV)
  • Package size: Contact to Techniq VN for details
  • Shelf life: Contact to Techniq VN for details

1. Product Overview

LOCTITE® SI 5926™ is a one-component acetoxy silicone gasket sealant that cures at room temperature (RTV) upon exposure to moisture, forming a flexible and durable silicone rubber gasket. It enhances load-bearing and shock-absorbing characteristics, providing resistance to aging, weathering, and thermal cycling without shrinking, hardening, or cracking.

  • Technology: Silicone
  • Chemical Type: Acetoxy silicone
  • Appearance: Blue paste
  • Curing Mechanism: Room temperature vulcanizing (RTV)
  • Application: Gasketing (replacement or dressing)
  • Operating Temperature Range: -54 °C to 204 °C

2. Applications

  • Suitable for valve covers, timing gear covers, differential covers, oil pans, transmission pans, water pumps, and thermostat housings.
  • Not recommended for parts in contact with gasoline or use as a cylinder head gasket.
  • Retains effectiveness in contact with automotive fluids like motor oil, transmission fluids, alcohol, and antifreeze.

. Typical Properties

Uncured Properties
Property Value
Extrusion Rate (1/8″ Nozzle, 0.62 MPa, 25°C) ≥550 g/min
Specific Gravity (@ 25°C) 1.04
Odor Acetic Acid
Curing Performance
Property Value
Tack-Free Time (@ 25°C, 50±5% RH) ≤60 min
Cured Properties (7 days @ 25°C, 50% RH)
Property Value
Shore Hardness (ISO 868, Durometer A) >25

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