Three Bond 1221G / 1221H

Three Bond 1221G/1221H Sealant at a Glance

The RTV silicone adhesive sealant Three Bond 1221G/1221H is a one-component, paste-like sealant. It cures through exposure to moisture in the air and provides elastic adhesion to metal, glass, and plastic. The 330 ml cartridge enables efficient dosing in manufacturing.

The alcohol-free formulation minimizes corrosion in sensitive areas and remains flexible at high temperatures. This makes the sealant well suited for electronics bonding.

Suitable for electronics bonding

Electronic housings and cable penetrations

Thanks to elastic adhesion, seals stay tight even under vibration.

Industrial applications

Resistance to moisture and chemicals makes it suitable for enclosure seals, motors, and switchgear connections.

Dimensions and specifications of 1221G/1221H

• Viscosity: paste-like
• Density: 1.04 g/cm³
• Temperature range: -60 °C to 200 °C
• Shore hardness: 28
• Elongation: 500 %
• Tensile strength: 2.5 MPa
• Shear strength: 1 MPa
• Color: Clear / White
• Shelf life: 12 months
• Main component: RTV silicone
• One-component: Yes
• Cartridge: 330 ml

High elasticity and corrosion protection

The alcohol-free formulation reduces corrosion in electronic connections. The elastic adhesion remains flexible under temperature changes.

• Good adhesion to metal, glass, and plastic
• Low corrosion in electronic environments
• High elongation for durable seals

Fast processing and practical notes

1. Prepare surfaces clean, dry, and free of grease.
2. Dispense the cartridge and apply evenly.
3. Allow the skin to form, then proceed with mounting.

Composition of the sealant

This is a one-component RTV silicone sealant in a 330 ml cartridge, suitable for electronics and enclosure sealing.

Temperature resistance and durability

The sealant withstands temperatures from -60 to 200 °C and offers 500% elongation for flexible, durable bonding.