RTV615, RTV655 and RTV656 silicone rubber compounds are clear liquids which cure at room temperature to high

strength silicone rubber with the addition of curing agents. These two-component products are supplied with curing agent

in matched kits which are designed for use at a convenient 10:1 ratio by weight.

These compounds are clear and colorless but differ in low temperature flexibility. All three are low viscosity, easily

pourable liquids with nominal viscosities ranging between 3000 and 7000 cps. RTV655 and RTV656 silicone rubber

compounds have the capability of remaining flexible at temperatures -115°C (-175°F).

RTV615, RTV655 and RTV656 silicone rubber compounds have been used for protection of electronic components and

assemblies against shock, vibration, moisture, ozone, dust, chemicals, and other environmental hazards by potting or

encapsulation of the components and assemblies.

The optical clarity of these silicone rubber compounds suggests evaluation for applications such as potting solar cells for

maximum light transmission and electronic assemblies where component identification is necessary or desirable. RTV655

and RTV656 silicone rubber compound are preferred where flexibility at temperatures down to -115°C (-175°F) is

required

Key Features and Benefits

Convenient 10:1 mixing ratio for use in automatic dispensing or hand operations

Low viscosity allows easy flow in and around complex parts, providing excellent electrical insulation and shock

resistance

Cure rate can be accelerated by heat

Will cure in deep sections or enclosed assemblies without exotherm and with low shrinkage

Chemical composition contains no solvents for ease of use on production lines

Reversion resistance and hydrolytic stability permit use in high humidity environments at elevated temperatures

Clarity permits visual inspection for easy identification and repair of encapsulated parts