Datasheet

GF400
Gap Filler
GF400 is a two part, liquid silicone based gap filler, which provides excellent thermal performance and can be
cured at room temperature or accelerated with heat. After curing GF400 forms a low modulus elastomer
preventing the ‘pump-out phenomenon’.
 Soft and compliant for low stress applications
 Low viscosity; easy to dispense
 High thermal conductivity
 Low modulus elastomer, prevents ‘pump-out’
Approvals
RoHS Compliant (2015/863/EU):
Yes
Typical Properties
Liquid Properties:
Base Material
Silicone
Colour Part A
Pink
Colour Part B
White
Mixed System Viscosity (mPa s @ 25°C)
220 000
Mix Ratio
1:1
Gel Time (25°C)
60 minutes
Cure Time (25 °C)
12 hours
Cure Time (60°C)
90 minutes
Cure Time (100 °C)
20 minutes
Cured System:
Cured Density (g/ml)
3.2
Thermal Conductivity (W/m.K)
4.0
Colour
Pink
Temperature Range (°C)
-50 to +200
Dielectric Strength (kV/mm)
9
Volume Resistivity (ohm-cm)
10
14
Shore Hardness @ 25ºC
55 Shore 00
Flame Retardancy
Meets UL94 V-0
Weight Loss after 96 hours @ 100°C
< 0.15%