Molykote 4 Electrical Insulating Grease, NLGI 2, -40 to 200°C

Molykote 4 is an electrical insulating compound with inert silica filler in polydimethyl silicone fluids, appearing as a white translucent grease (NLGI Grade 2). Key features include high dielectric strength (460 V/mil), stability from -40°C to 200°C, low volatility, and moisture resistance, complying with SAE AS 8660 and FDA 21 CFR 175.300 standards.

Engineered for electrical insulation and sealing with lubrication capabilities, Molykote® 4 utilizes a silica-enhanced formula to deliver exceptional dielectric properties (dielectric constant 2.98@100Hz) and volume resistivity (1.1×10¹⁵ Ω*cm). Certified to NSF 51/61 for food contact, it resists water/methanol/mineral oil but disperses in xylene/mineral spirits for spray/dip applications.

Beyond insulation, Molykote 4 exhibits ultra-low dissipation factor (<0.0001@100Hz) and 135-second arc resistance. Its chemical stability withstands dilute acids/alkalis/oils, while thermal oxidation stability limits evaporation to ≤2.0% at 200°C (30hrs). Note: It degrades silicone rubber and is incompatible with liquid oxygen.

Widely used for moisture-proof sealing in aviation/automotive ignition systems, spark plugs, and cable connectors (e.g., high-voltage connectors). As an assembly lubricant, it suits metal-plastic/rubber components (e.g., door seals, O-rings). Industry-proven cases include Tesla battery terminal anti-corrosion and marine electrical box waterproofing (Source: Molykote® official application database).