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Momentive RTV88 – high-temperature silicone elastomer

Item No.: RTV88
Manufacturer: Momentive Performance Materials
Technologies: Two-part silicone rubber
Cure Type: Room temperature cure 
Package Size: Available in various sizes (contact for specifics)
Shelf Life: 12 months

RTV88 is a high-viscosity, two-part, high-temperature silicone elastomer from Momentive. Supplied as a base compound with a standard dibutyl tin dilaurate (DBT) curing agent, it offers excellent thermal stability, adhesion (with primer), and release properties. It is ideal for demanding applications such as potting motors, rubber mold fabrication, and insulation under harsh conditions. It cures at room temperature and remains elastomeric from -54 °C to 260 °C, with short-term resistance up to 316 °C.

  • Color: Red

  • Consistency: Spreadable paste

  • Viscosity: 880,000 cps

  • Specific Gravity: 1.47

  • Work Time @ 25 °C (with 0.5% DBT): 0.75 hrs

  • Cure Time @ 25 °C: 24 hrs

  • Hardness (Shore A): 58

  • Tensile Strength: 59 kg/cm² (830 psi)

  • Elongation: 120%

  • Tear Strength: 8 kg/cm (42 lb/in)

  • Shrinkage: 0.6%

  • Dielectric Strength: 17.4 kV/mm

  • Dielectric Constant (1 kHz): 4.3

  • Dissipation Factor (1 kHz): 0.03

  • Volume Resistivity: 2.8 x 10¹⁴ ohm-cm

  • Thermal Conductivity: 0.31 W/m·K

  • Thermal Expansion Coefficient: 20 × 10⁻⁵ cm/cm·°C

  • Specific Heat: 0.35 cal/g·°C (0.35 BTU/lb·°F)

  • Temperature Resistance: -54 °C to 260 °C (up to 316 °C short term)

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