RTV - 846 is condensation cure flexible syntactic foam RTV silicone rubber. RTV-846 exhibits excellent flow properties and low density. Applications include potting electronics requiring low dielectric constant and low capacitance. RTV 846 has found use in the aircraft and aerospace industries.


Color Clear (Part B)
White (Part A)
Viscosity, cps 25000 (Part A)
100 (Part B)
Specific Gravity 0.70 (Part A)
0.98 (Part B)
Mix Ratio 100:10 (By Weight)
Mixed Viscosity 10000 cps
Shelf Life 12 months @ 72 °F
Durometer Hardness 45 (Shore A)
Tensile Strength 350 psi
Tensile Elongation 100 %
Tear Strength 20 ppi
Service Temperature Range -54 to 204 ºC
Pot Life 120 minutes @ 72 ° F
Coefficient of Thermal Expansion 2.2 x 104 (cm/cm-°C)
Dielectric Constant 2.5 (100 Hz)
Dissipation Factor 0.002 (60 Hz)
Volume Resistivity 1 x 1015 ohm-cm
Linear Shrinkage 0.06 % After 3 days
Dielectric Strength 500 V/mil
Thermal Conductivity 1 BTU in/ft2 hr °F
Use Instructions
Pre-mix RTV-846 Base thoroughly. Weigh out the required amount and add the required amount of Catalyst. Mix thoroughly scraping both the bottom and sides of the mixing container. Apply material.
Cure Schedule:
24 hours @ room temperature
Pot Life and cure is dependent on temperature & humidity.
Ideal conditions: 68-78°F (20-26°C)
40-60% relative humidity