Epoxosil RTV-1111

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General Purpose RTV Silicone Sealant/Encapsulant.

 

Description:

Epoxosil RTV-1111 is a multi-purpose casting material for use as an encapsulant, sealant potting compound, coating compound and reproduction molding compound.  Epoxosil RTV-1111 has been used successfully in protecting electronic components, assemblies and delicate systems.  Epoxosil RTV-1111 exhibits excellent electrical properties, low temperature flexibility and high temperature stability.  A variety of catalysts are available for different cure situations.

Properties - Uncured:-

Color, visual                                                               White

Viscosity ASTM-D-1084                                          12,000 cps

Specific Gravity                                                         1.18

Mix Ratio (RTV cat 12)                                            0.1-0.5 by weight

Mixed Viscosity                                                         10,000 cps

Shelf Life @ 72C                                                     6 months minimum

Properties - Cured:-

Physical:

Hardness, ASTM-D-2240 (Durometer)                  Shore A 45

Tensile Strength, ASTM-D-412                               350 psi

Tensile Elongation, ASTM-D-412                            190%

Tear Strength, ASTM-D-624 (Die B lb./in.)             15

Coefficient of Thermal Expansion (cm/cm/C)        25 x 10^-5 psi

Service Temperature                                                  -55C to 204C

Shrinkage                                                                     0.2% to 0.5%

Electrical:

Dielectric Strength, ASTM-D-149 (volts/mil)            500

Dielectric Constant, ASTM-D-150 (60 Hz)               3.5

Dissipation Factor, ASTM-D-150(60 Hz)                  0.019

Volume Resistivity, ASTM-D-257 (ohm-cm)             1x10^15

Thermal Conductivity                                                    2.0 BTU

Mixing Instructions:

  1. Weigh out the required amount of Epoxosil RTV-1111.

  2. Measure the required amount of catalyst.

  3. Mix thoroughly, scraping both the bottom and sides of the mixing container.

  4. Evacuate mixture @ 29 in Hg for 3-4 minutes to insure a void-free casting.

  5. Pour into unit, cavity or mold.

Cure Schedule:

Overnight at room temperature (12-16 hours) @ 72F.  Faster tack-free surfaces achieved using varied catalysts.

 

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