Epoxosil RTV

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 @ 72ºC 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/ºC) 25 x 10^-5 psi

Service Temperature -55ºC to 204ºC

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:

Weigh out the required amount of Epoxosil RTV-1111.
Measure the required amount of catalyst.
Mix thoroughly, scraping both the bottom and sides of the mixing container.
Evacuate mixture @ 29 in Hg for 3-4 minutes to insure a void-free casting.
Pour into unit, cavity or mold.

Cure Schedule:

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