LOCTITE SI 5604

Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium

LOCTITE SI 5604

Main features

  • 4:1 Volume Mix Ratio
  • 5 to 10 Minute Fixture Time
  • 205% Cured Elongation

Product Description

LOCTITE SI 5604 is a two-part neutral alkoxy silicone adhesive/sealant that mixes Part A and Part B at 4:1 by volume. At 25 deg C, fixture time is 5 to 10 minutes on steel and Alclad using the stated ISO 4587 threshold. The product is used for industrial bonding and sealing applications. After seven days at 22 deg C and 50% RH, typical cured properties include Shore A hardness 42, 205% elongation, tensile strength of 2.1 N/mm^2, volume resistivity of 5.1x10^14 ohm cm, and dielectric breakdown strength of 20 kV/mm.

Key features

  • Two-Part Mixing: Part A and Part B are mixed at 4:1 by volume.
  • Assembly Handling: Reaches fixture strength in 5 to 10 minutes on steel and Alclad at 25 deg C under the stated ISO 4587 threshold.
  • Cured Flexibility: Typical elongation is 205% by ISO 37 after seven days at 22 deg C and 50% RH.

Applications

Industrial bonding and sealing applications.

Product Family

LOCTITE SI 5604

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Chemistry Type
Alkoxy silicone
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Two (A | B)
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.
≥120 %
Thermal Properties
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding. The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
-52 °C
Electrical Properties
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
5.1×10¹⁴ Ohms⋅cm
Other Properties
Storage Temperature
8 °C to 21 °C

Additional Information

Technical properties

As-supplied / before-processing properties

Component values and mix ratio are retained separately for the two-part system.

PropertyValueUnitMethod / condition
Mix ratio4:1by volumePart A : Part B
Part A specific gravity1.2 to 1.4-25 deg C
Part A viscosity40,000 to 90,000mPa sCone and plate; 25 deg C; CP20-2; 20 s^-1
Part B specific gravity1.6 to 1.8-25 deg C
Part B viscosity20,000 to 70,000mPa sCone and plate; 25 deg C; CP20-2; 20 s^-1
Technical properties

After-processing / final-state properties

Typical cured-material values under the documented seven-day cure and test conditions.

PropertyValueUnitMethod / condition
Shore hardness42Shore AISO 868; after 7 days at 22 deg C / 50% RH
Elongation205%ISO 37; same seven-day cure
Tensile strength2.1N/mm^2ISO 37; same seven-day cure
Volume resistivity5.1x10^14ohm cmIEC 60093; cured material
Dielectric breakdown strength20kV/mmIEC 60243-1; cured material

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