Products

Momentive RTV577 Silicone Rubber Compound

  • Item No.: SILTRUST™ RTV577
  • Manufacturer: Momentive
  • Technologies: Two-component, room-temperature curing silicone elastomer
  • Color: White
  • Cure Type: Room-temperature cure
  • Package Size: Various sizes available
  • Shelf Life: 12 months

RTV577 is a two-part, low-temperature curing silicone rubber compound designed for high-performance applications requiring excellent temperature stability and flexibility. It is supplied as a base compound with DBT (dibutyl tin dilaurate) curing agent for standard applications. This product offers strong adhesion (with primer), excellent release properties, and durability over a wide temperature range.

Key Features & Benefits:

✔ Two-part system with adjustable work and cure times
✔ Wide operating temperature range (-115°C to 204°C)
✔ Solvent-free formulation
✔ Excellent adhesion with primer
✔ Retains elastomeric properties after curing

Potential Applications:

  • Aerospace & Industrial Applications – High-performance sealing and gasketing
  • Electrical & Electronic Components – Insulation and protective coatings
  • Mold Making & Prototyping – Durable rubber molds for complex shapes

Technical Data for RTV577

Property RTV577 Value
Uncured Properties
Color White
Consistency Paste
Viscosity 700,000 cps
Specific Gravity 1.35
Uncured (with 0.5% DBT Curing Agent)
Work Time (@ 25°C) 2 hours
Cure Time (@ 25°C) 24 hours
Cured Properties (after 7 days @ 25°C, 50% RH)
Hardness (Shore A) 48
Tensile Strength 31 kg/cm² (440 psi)
Elongation (%) 150
Tear Strength 6.8 kg/cm (38 lbs/in)
Shrinkage (%) 0.65
Electrical Properties
Dielectric Strength 18.5 kV/mm (470 V/mil)
Dielectric Constant 3.9
Dissipation Factor 0.02
Volume Resistivity 5.6 × 10¹⁴ ohm-cm
Thermal Properties
Useful Temperature Range -115°C to 204°C (-175°F to 400°F)
Thermal Conductivity 0.31 W/m·K
Coefficient of Linear Expansion 20 × 10⁻⁵ cm/cm°C (11 × 10⁻⁵ in/in°F)

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