NovagardÂ® G687 is a grease-like material formulated with select polydimethyl siloxane fluids in combination with inert, amorphous silica fillers. G687 is an excellent water barrier with superior corrosion protection properties.
Designed for use as a dielectric compound on high voltage insulators, Novagard G687 reduces the opportunity for dirt and moisture to create arcing across the insulator. G687 prevents the formation of a conducting film of water thereby eliminating any arc-over under wet conditions. The silicone engulfs, and encapsulates any water-borne, hydrophilic particles so that the insulator remains water repellant even in dusty, highly conductive atmospheres. G687 is also an excellent mold release and rubber lubricant. The compound may be applied by wiping, brushing or by spraying.