Reliable Applications of Cemedine 8008 One-Component Silicone in Industrial Fields​

Reliable Applications of Cemedine 8008 One-Component Silicone in Industrial Fields​​​

​​I. Product Characteristics and Technical Principles​​

Cemedine 8008 is a one-component, de-alcohol-type, room-temperature vulcanizing silicone rubber. Based on polydimethylsiloxane, it cures by reacting with atmospheric moisture, releasing trace ethanol without corroding substrates or the environment. Key features include:

• •

  ​​Weather Resistance​​: Maintains elasticity from -60°C to +200°C long-term, with short-term tolerance up to 250°C.

• •

  ​​Electrical Insulation​​: High volume resistivity (≥1×10¹⁵ Ω·cm) and stable dielectric constant, suitable for humid environments.

• •

  ​​Adhesion​​: Bonds well to metals, glass, ceramics, and most plastics without primer.

• •

  ​​Ease of Use​​: One-component formulation enables manual or automated dispensing.​

​​II. Practical Case: Sealing of New Energy Vehicle Battery Modules​​

​​Background​​: A NEV manufacturer required a sealing solution for battery modules, demanding high-temperature resistance, vibration tolerance, and long-term moisture/dust protection.

​​Challenges​​:

• •

  Shell temperature reaches 90°C during operation (peaking at 120°C);

• •

  Vibration causes rigid seals to crack;

• •

  IP67 certification (against dust and water immersion) required.

​​Solution​​:

1. 1.

   ​​Surface Preparation​​: Clean aluminum alloy surfaces with isopropanol.

2. 2.

   ​​Dispensing​​: Apply a continuous bead of Cemedine 8008 (width ≥1.5mm) via automated dispensing.

3. 3.

   ​​Curing​​: Assemble covers and cure at room temperature for 24 hours (or 60°C/30 minutes for accelerated curing).

​​Results​​:

• •

  Passed IP67 tests (30-minute immersion at 1-meter depth);

• •

  No degradation after 1000 hours of damp heat testing (85°C/85%RH);

• •

  Vibration resistance met ISO 16750-3 standards, ensuring long-term battery safety.​

​​III. Other Industrial Applications​​

1. 1.

   ​​Electronic Component Protection​​:

   • •

     Conformal coating for PCBs to prevent short circuits in humid conditions;

   • •

     Cured elastomer buffers mechanical shocks.

2. 2.

   ​​LED Lighting Sealing​​:

   • •

     UV resistance enables outdoor LED lens bonding and sealing;

   • •

     Accommodates thermal expansion without failure.

3. 3.

   ​​Household Appliance Manufacturing​​:

   • •

     Seals heater bases in water heaters, resisting scale and high temperatures;

   • •

     Seals waterway interfaces in coffee makers, complying with food safety standards (subject to specific certifications).​

​​IV. Conclusion​​

Cemedine 8008 provides a reliable industrial sealing solution through its temperature tolerance, elasticity, and process adaptability. Its performance in new energy vehicles, electronics, and appliances demonstrates suitability for demanding environments. Manufacturers should conduct tests based on substrates and processes to optimize dispensing and curing parameters.