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DOWSIL™ TC-5515 LT Thermal Gap Filler Kit Grey 70 KG | Official Distributor

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Technical Product Information

DOWSIL™ TC-5515 LT Thermal Gap Filler Kit Grey 70 KG

Product Overview

DOWSIL™ TC-5515 LT Thermal Gap Filler Grey is a 2-part (1:1 mix ratio), 2.0 W/m.K thermally conductive silicone gap filler engineered for heat dissipation in electric vehicle (EV) battery modules, power electronics, and high-volume electronic assemblies. Featuring "LT" (Low Density) technology, it provides a reduced specific gravity compared to conventional gap fillers, directly contributing to automotive lightweighting initiatives. Upon room or heat-accelerated cure, it forms a soft, low-stress silicone elastomer that absorbs mechanical tolerances and thermal stress. The bulk 70 kg pail kit (35 kg Part A + 35 kg Part B) offers excellent processing efficiency for automated meter-mix dispensing systems and robotic assembly lines.

Key Features and Benefits

• Low Density Formula (LT): Lower specific gravity helps reduce battery pack and overall vehicle assembly weight.
• Balanced Thermal Conductivity (2.0 W/m.K): Delivers efficient heat management from battery cells and power modules to cooling plates.
• Soft, Low Compression Stress: Low durometer cured elastomer cushions sensitive battery cells and circuits without inducing stress.
• 1:1 Convenient Mix Ratio: Equal 1:1 mix ratio by weight or volume simplifies automated meter-mix dispensing setup.
• Slump-Resistant Rheology: Holds shape upon dispensing, resisting sag or movement on vertical surfaces prior to cure.
• Broad Thermal Stability: Maintains physical and thermal performance across operating temperatures from -45°C to +150°C (-49°F to +302°F).

Technical Specifications

• Appearance / Color: Grey
• Packaging / Net Weight: Pail Kit / 70 KG (35 KG Part A + 35 KG Part B)
• Chemical Base: 2-Part Thermally Conductive Silicone (Addition-cure / Platinum catalyst)
• Mix Ratio (by weight / volume): 1:1
• Thermal Conductivity: ~2.0 W/m.K
• Density (Cured): ~2.0 g/cm³ (Low density)
• Service Temperature Range: -45°C to +150°C (-49°F to +302°F)

Applications

• Filling thermal gaps between electric vehicle (EV/HEV) battery cells/modules and cooling plates (chiller plates).
• Automotive power electronics, traction inverters, DC-DC converters, and battery management systems (BMS).
• Industrial power supplies, energy storage systems (ESS), and telecommunications hardware.
• High-volume automated applications requiring lightweighting, low compression stress, and 2.0 W/m.K performance.

Usage Note: Mix Part A and Part B in a 1:1 ratio using automated meter-mix dispensing equipment fitted with static mixers. Avoid contact with sulfur, amines, or organometallic compounds to prevent platinum catalyst cure inhibition. Fully optimized for high-throughput robotic dispensing lines with pail pumps.