The Momentive RTV627 Silicone Rubber Compound is a two-component room temperature vulcanizing Momentive Performance Materials rubber compound for potting and encapsulation, particularly where flammability is of concern. This product is supplied with curing agent in matched kits which are designed for use at a convenient 1:1 ratio by weight or volume. The RTV627 silicone rubber compound is dark gray in color and has an easily pourable viscosity of about 1300 cps.

The RTV627 silicone rubber compound is recommended for evaluation in applications such as a production line potting compound to provide protection of electronic components and assemblies against thermal shock, vibration, moisture, ozone, dust, chemicals, and other environmental hazards. Other applications include encapsulation of high voltage transformers, voltage regulators, power converters and complete power supplies.