DOW® DC 4 Electrical Insulating Sealant is a silicone-based, grease-like compound for sealing, lubricating, and insulating electrical connections. Offers excellent dielectric strength, water repellency, oxidation resistance, and a reliable moisture barrier for damp environments.
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Overview
This non-curing, non-melting silicone paste is essentially non-toxic and highly durable. It maintains stability across a wide temperature range and harsh environments. DOW® DC 4 protects electrical connectors, cable ends, and terminal strips from moisture, arcing, and corrosion. It is widely used in industrial, automotive, and marine applications as a general-purpose electrical maintenance material.
Features & Benefits
Excellent dielectric properties: Prevents shorts and ensures reliable electrical performance
Highly water repellent: Creates a moisture barrier for protection in wet or outdoor environments
Wide service temperature range: Performs reliably in diverse environmental conditions
Resistant to oxidation: Long-lasting stability against air and chemical exposure
Non-melting, non-curing: Maintains consistent paste form without hardening or flowing
Material compatibility: Safe for most plastics, rubbers, and elastomers
Essentially nontoxic: Safer to handle compared to some industrial compounds
Specifications
Part Number: DC4-30Z
Container Size: 3 oz
Form: Grease-like Paste
Color: Translucent White/Light Gray
Odor/Scent: Odorless
Consistency: Medium (NLGI Grade 2-3 equivalent)
Composition: Inert silica filler combined with selected polydimethyl silicone fluids
Specific Gravity: 1.0 g/cm³
Dielectric Strength: >500 Volts/mil
Shelf Life: 60 months (5 years)
Technical Information
Applications: Sealing and insulating electrical connections, terminals, power assemblies; moisture-proof sealing for ignition systems, spark plug boots, disconnect junctions; lubricating O-rings and rubber gaskets; marine corrosion prevention
Military Specifications: Often meets or exceeds MIL-S-8660C requirements
Application Method: Can be applied by hand, brush, or automated dispensing; surfaces should be clean and dry for best results
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Product information provided "as is", and Boeing may add, change, discontinue or remove product information at any time. Product photos may not be exact match to product delivered. Seeterms & conditions.
