Electrolube GF400 thermal gap filler

Electrolube has introduced a versatile range of gap-filling products with good thermal performance. GF400 is a two-part, liquid silicone-based gap filler, which can either be cured at room temperature or accelerated with heat. Following cure, the product forms a low-modulus elastomer that prevents the ‘pump-out phenomenon’, for minimal degradation of effective heat dissipation.

The gap filler is soft and compliant, making it suitable for low-stress applications, and provides a wide operating temperature range between -50 to +200°C. It’s also low viscosity, enabling easy dispensing, and provides high thermal conductivity of 4 W/m.K. It has a straightforward mix ratio of 1:1 and a fast cure time of 20 min at 100°C, for high throughput. Alternatively, the gap filler can be cured at 25°C for 12 h or 60°C for 90 min.

Thermal gap fillers are widely used for mobile and touch screen applications; however, the GF400 range is adaptable and can be used in a multitude of applications, from printed circuit board assembly and housing electronic components discretely to automotive electronics, including HEV, NEV and batteries, power electronics, LEDs and fibre-optic telecoms equipment. It is UL94 V-0 approved and has dielectric strength of 9 kV/mm.