Silicone-rubber base flame retardant adhesives

For fixing electronic devices, with outstanding electrical properties

  • Product name
  • Features
    • 1 liquid typing room-temperature hardening type adhesives hardened within 10 minutes as a tack free time.
    • Features high electrical insulation characteristics.
    • Maintains rubber elasticity and adhesiveness.
    • Readily squeezed from the tube, the product is easy to handle. There is no threading or drop, ensuring neat joining, sealing, mounting and heat radiation.
    • Produces only small amounts siloxane gas.

Product Lineup


Product name SC970
Main component Silicone rubber base
Property Non-liquidity paste
Color Gray
Solid content (wt%) 97% or more
Specific gravity About 1.6
Tack free time (23°C) Within 10 minutes
Container 160g tube or 333ml cartridge
Warranty period from manufacturing date 9 months
  • *UL Certificated. File No.E63260 94V-0 (t = 3.0mm) and UL94V-1 (t = 1.0mm)

The product is suitable for fixing electronic devices, insulation sealing, and mounting, including:

1.Sealing for insulation, waterproofing, dust proofing, damping, or airtightness; mounting; and bonding of printed circuit board, high-voltage components (such as flyback transformers), hybrid ICs, sensors and other electronic devices.
2.Sealing of coils.
3.Fixing lead wires.

・Sealing for waterproofing, dust proofing, and damping; mounting; and bonding in home electrical appliances, communication devices, or measuring instruments.
・General joining of metals, glasses or plastics.

1.Curing speed

The adhesive is moisture cure type, Thus the curing rate depends on the ambient humidity in the workplace. Curing starts at the surface in contact with air, and proceeds inwards slowly, thus taking some time to complete.

Test Piece Condition

[A 14mm deep glass dish with a 25mm inner diameter was filled with uncured SC970 and the thickness of the cured layer after being left for a certain period of time at various temperature and humidity environments was measured.]


2.Siloxane outgassing under each temperatures (Reference)

Test Piece Condition
[The amount of capture cyclic dimethyl siloxanes at the time of 100°C and 150°C heating of SC970 by GC-MS and our existing product is measured. We converted the cyclic dimethyl siloxanes D3~D10 as tetradecan, and quantified it.]


Siloxane outgassing Product name SC901 SC950 SC970
100℃ 1,104 1,901 253
150℃ 3,179 4,196 309

3.Property after curing

Test Piece Condition

Curing condition:23°C±5°C 60±20%RH x 7days

Product name SC970
Appearance Rubber-like elastic material
Specific gravity About 1.6
Hardness JIS A 50
Tensile strength (MPa) 2.3
Elongation (%) 150
Thermal conductivity (W/mk) 0.7
Electric resistivity
Test circuit pattern(Conductor space 1.27cm)
1012 or more
Volume resistivity (Ω・m) 2.0X1011
Dielectric breakdown strength DC (kV/mm) JIS C2110 13 or more
Dielectric constant (ε) 1MHz JIS K6249 4 or less
Dielectric dissipation factor (tanδ) 1MHz JIS K6249 0.01 or less

4.Bonding strength on various type of substrate (Shear strength)

Test Piece Condition

Specimen size:1mm
Bonding area:25mm x 10mm
Curing condition (Initial):23°C±5°C 60%±20%RH x 7 days
Aging condition:60°C x 168 hours or 100°C x 168 hours
Measuring condition:23°C±5°C 60%±20%RH
Peeling speed:10mm/min



Shear strength Substrate Product name
Initial After aging Aging condition
Polystyrene/Polystyrene 170 131 60°C
168 hours
ABS/ABS 201 267
PMMA/PMMA 186 187
PVC (rigid)/PVC (rigid) 194 151
Phenol/Phenol 199 193
Glass epoxy/Glass epoxy 226 234 100°C
168 hours
Copper plate C1100P/C1100P 172 169
Steel plate SECC/SECC 152 174
Aluminum A1050P/A1050P 130 150
Aluminum A5052P/A5052P 151 182

5.Hardness change characteristic

Test Piece Condition

[Curing condition of SC970 is 7 days at 23°C 60%RH, and shore hardness change of the rubber-like cured materials in lapsed time will be measured under 150°C temperature environment after this.]


6.Electrical property (Insulation resistance voltage)

Test Piece Condition
Substrate: JIS Z3197 Comb electrodes pattern (Conductor distance:1mm)
Thickness of adhesive: 200μm
Curing condition (Initial): 23°C±5°C 60%±20%RH x 7 days
Measuring temperature: 23°C 60%RH, 60°C 90%RH, 100°C
Aging Time: 500 hours, 1000 hours


Insulation resistance voltage Product name Time 23°C 60%RH 60°C 90%RH 100°C
SC970 Initial 5.0E+12 - -
500 hours 6.0E+12 6.8E+12


1000 hours 6.0E+12 6.2E+12 7.0E+13


Please read notes indicated on the relevant safety data sheet(SDS) for precautions required for operation.


Note on the characteristic data given - Data on the characteristics of the products described in this page based on the results of evaluations carried out by the company. This does not guarantee that the characteristics of the product conform with your usage environment. Before use, review the usage conditions based on evaluation data obtained from the equipment and substrates actually used.

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