Momentive RTV511 2K Silicone Capable Sealant

Product code: RTV511

Manufacturer: Momentive

Package size: 454 gr

Shelf Life:

RTV511 silicone rubber compound is low-temperature two-part silicone elastomers. They are supplied ready to use with a base compound and DBT (dibutyl tin dilaurate) as the standard curing agent. DBT is suitable for most applications, however, other catalysts are available to facilitate deep section cure, faster cure, and automated mixing. RTV511 has the widest useful temperature (highest and lowest) of any silicone elastomer


  • Variable work times and cure rates by adjusting the amount and type of curing agent
  • Room temperature cure
  • Composition free of solvents and solvent odor
  • Excellent adhesion capabilities with primer
  • Excellent release properties
  • Retention of elastomeric properties with the following temperature ranges:
  • RTV511 at temperatures from -115°C (-175°F) up to 204°C (400°F) continuously and up to 260°C (500°F) for short periods of time


  • Cast in place heat shielding
  • Adhesion of thermal blankets
  • Protective coatings and thermal insulation for sensitive components and critical equipment
  • Encapsulants & potting for high heat locations
  • Interior & exterior adhesives
  • Flexible composite coatings
Color White
Consistency Pourable
Viscosity, cps 16,000
Specific Gravity 1.21
Work Time @ 25°C (77°F), hours 1.5
Cure Time @ 25°C (77°F), hours 24
Hardness, Shore A Durometer 42
Tensile Strength, kg/cm2
27 (380)
Elongation, % 170
Tear Strength, kg/cm (lb/in) 3.8 (31)
Thermal Conductivity, W/mK 0.26
Coefficient of Linear Thermal
Expansion, cm/cm, °C
22 x 10^-5

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