DOWSIL

DOWSIL™ SE 4420 Thermally Conductive RTV Silicone Sealant (330 ml Cartridge) - Türkiye's Official Distributor

Barcode : 1.YP.DC1.EY.KR.ST.BS.029

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Technical Product Data

DOWSIL™ SE 4420 Thermally Conductive RTV Sealant (330 ml) – One-Part Neutral Silicone Adhesive

Product Description

DOWSIL™ SE 4420 is a one-part, room-temperature moisture-curing (RTV) non-slump thermally conductive silicone adhesive engineered to provide effective thermal transfer and strong unprimed adhesion between heat-generating electronic components and heatsinks. Its non-corrosive neutral cure system is safe for sensitive circuits.

Key Features

• Thermal Conductivity: ~0.92 W/m·K (Balanced heat dissipation)
• Cure Mechanism: One-part RTV neutral alkoxy moisture cure (no mixing required)
• Unprimed Adhesion: Primerless bonding to metals, glass, ceramics, and PCB laminates
• Consistency: Non-slump paste consistency holds shape on vertical joints
• Electrical Insulation: High dielectric strength prevents electrical shorting
• Flame Rating: UL 94 V-0 recognized flame retardancy
• Operating Temperature: Stable service performance from -45°C to +200°C

Applications

• Bonding heat-generating power semiconductors, transistors, and diodes to heatsinks
• Thermal management in LED drivers, power supplies, and automotive ECUs
• Structural bonding and thermal interface creation for components mounted on PCBs
• Applied via manual caulking guns or automated dispensing equipment

Key Advantages

• Standard 330 ml cartridge format offers convenient application for assembly lines and field repairs
• Ready-to-use single-component formula eliminates mix ratio errors and pot-life issues
• Non-corrosive neutral cure formula is safe for sensitive copper and electronic tracks
• Provides long-term resistance against thermal shock, vibration, and environmental moisture

Application Note: Substrate surfaces should be thoroughly cleaned and degreased with solvent prior to application for maximum adhesion strength.