Loctite HHD 3622BK SY is a one-part RTV black elastomeric sealant with premium thermal conductivity and dielectric insulation properties. It cures at room temperature, forms a flexible rubber layer that resists heat, vibration, moisture and ageing. The formula adheres well to metal, PCB, plastic and ceramic without corroding sensitive electronic parts.

• Type: Thermal conductive RTV silicone sealant

• Cure Method: RTV room temperature cure

• Appearance: Black

• Thermal Conductivity: ≥0.8 W/m·K

• Temp Range: -55℃ ~ 180℃

• Key Property: Heat dissipation, insulation, waterproof sealing

• Package: 30ml

• Thermal Conductive Performance – Efficiently transfers heat away from heat-generating electronic components.

• Black RTV Flexible Cure – Room temp vulcanizing, remains elastic to absorb vibration and thermal expansion.

• High Electrical Insulation – Excellent dielectric strength to prevent short circuit and electric leakage.

• Waterproof & Dustproof – Seals gaps tightly to block moisture, dust and chemical vapour ingress.

• Multi-Substrate Adhesion – Strong bonding to metal, PCB, plastic, ceramic and industrial housing materials.

• CPU & Power Module Thermal Sealing – Heat conduction and edge sealing for power semiconductor modules.

• Electronic Housing Bonding – Seal and fix electrical enclosures, control boxes and adapter casings.

• LED Lighting Sealing – Waterproof sealing and heat dissipation for LED driver and lamp assemblies.

• Automotive Electronics – Sealing for car ECU, sensors and onboard control modules.

• PCB Conformal Sealing – Edge potting and insulation sealing for printed circuit boards.