MOLYKOTE 4 Electrical Insulating Compound – 150g

Product Overview

MOLYKOTE 4 Electrical Insulating Compound is a silicone-based compound developed for electrical insulation, moisture-resistant sealing and lubrication of compatible components. Manufactured under the MOLYKOTE brand by DuPont, it combines high dielectric strength with good adhesion, water repellency and a broad operating temperature range.

Its semi-flowable consistency allows the compound to spread across suitable contact surfaces and enter some complex geometries. This makes it useful for sealing and lubricating compatible electrical connectors, battery terminals, rubber seals, switches and elastomer or polymer O-rings.

The 150g pack is a practical option for electrical maintenance teams, automotive workshops, industrial technicians and equipment service providers that need a dedicated insulating compound for specified applications.

Key Features and Benefits

High Dielectric Strength

MOLYKOTE 4 is designed to provide high dielectric strength and excellent electrical insulating properties. It is used in applications where moisture protection and electrical insulation around compatible components are required.

The compound should be applied according to the equipment manufacturer’s instructions. It does not replace suitable connector design, electrical clearances, grounding, protective devices or safe isolation procedures.

Moisture Resistance and Water Repellency

The formulation provides good moisture resistance and water repellency. When applied correctly to suitable assemblies, it helps form a moisture-resistant seal around connectors, terminals and other compatible interfaces.

This is particularly useful in transportation and industrial environments where humidity, splashing water and environmental exposure can affect electrical connections.

Silicone-Based Formulation

The silicone-based formulation offers thermal stability and compatibility with many dry materials, including metals, elastomers, polymers and ceramics. Material compatibility should still be verified for the specific seal, plastic or elastomer used in the assembly.

Semi-Flowable Consistency

MOLYKOTE 4 has a semi-flowable consistency that can help the compound enter complex geometries. Its rheology can change under shear, potentially increasing flow characteristics. Validate the dispensing method and containment design where precise placement is important.

Wide Operating Temperature Range

The manufacturer lists a service temperature range of −54°C to +200°C. This supports use in compatible applications exposed to both low and elevated temperatures.

The actual suitability of the compound depends on the assembly design, material compatibility, exposure conditions and equipment requirements.

Adhesion and Low Volatility

The compound adheres well to many dry surfaces and has low volatility and evaporation. These characteristics support its use as a lubricant and moisture-resistant seal in suitable electrical and mixed-material assemblies.

No Intentionally Added PFAS or PTFE

DuPont states that MOLYKOTE 4 contains no intentionally added polytetrafluoroethylene (PTFE) or per- and polyfluoroalkyl substances (PFAS). This is a manufacturer formulation statement and should not be interpreted as a guarantee of compliance with every PFAS-related regulation or analytical testing requirement.

Applications of MOLYKOTE 4 Electrical Insulating Compound

MOLYKOTE 4 is intended for specified electrical sealing and mixed-material lubrication applications, including:

• Electrical connectors: Moisture-resistant sealing of compatible sealed connectors.
• Cable connectors: Lubrication and sealing of suitable connector assemblies.
• Battery terminals: Moisture protection for compatible terminal assemblies.
• Ignition systems: Sealing and lubrication of specified ignition-system connections.
• Disconnect junctions and terminals: Moisture-resistant protection in suitable electrical assemblies.
• Rubber seals: Lubrication and sealing of compatible elastomeric components.
• O-rings: Applications involving compatible rubber and plastic O-rings.
• Switches and electrical assemblies: Selected applications where the compound is specified.
• Metal-on-polymer assemblies: Lubrication and sealing between compatible metal and plastic components.
• Metal-on-rubber assemblies: Assembly lubrication for suitable rubber and metal interfaces.

These examples do not mean that the compound is suitable for every electrical connector, voltage rating, seal material or application. Confirm compatibility with the equipment manufacturer’s requirements before use.

Technical Characteristics

MOLYKOTE 4 is a light-grey to translucent-white, silicone-based compound with a silica thickener. The manufacturer identifies its consistency as NLGI Grade 2–3 and lists a temperature range of −54°C to +200°C.

Published typical properties include unworked penetration of 200–250 (0.1 mm), worked penetration of up to 310 (0.1 mm), and dielectric strength of 338 V/mil measured at a 50 mil thickness under the cited test method.

The manufacturer also reports moisture-sealing performance and low evaporation under specified test conditions. These values are typical laboratory results, not guaranteed acceptance limits for every application.

Consult the current manufacturer technical data sheet for test conditions, complete properties and application-specific guidance.

Application and Handling Instructions

Apply the compound by hand, brushing or wiping it onto the specified clean surfaces. Use an application quantity appropriate for the connector, seal or assembly design.

Because the compound can become more flowable under shear, assess dispensing equipment and containment requirements before using automated application methods. Certain grease guns may not be suitable for silicone compounds, so test the equipment before regular use.

Do not apply the compound to surfaces that must subsequently be painted or coated unless compatibility has been confirmed; silicone contamination can interfere with coating adhesion.

Read the product label and current Safety Data Sheet before handling. Follow the recommended storage, handling and disposal instructions.

Why Choose the 150g Pack?

The 150g pack is a convenient option for electrical maintenance, automotive servicing, industrial repairs and workshop applications where a dedicated insulating compound is needed in a manageable quantity.

Before ordering, verify the supplied tube size, product identification and packaging. Follow the manufacturer’s instructions to ensure the compound is suitable for the intended connector, seal or electrical assembly.

Buy MOLYKOTE 4 Electrical Insulating Compound from Technosteer Online

Technosteer Online supplies industrial maintenance products and specialty lubricants for commercial and industrial customers.

For MOLYKOTE 4 Electrical Insulating Compound – 150g, enquire about current availability, pricing and commercial supply options. Confirm the exact packaging and product documentation before placing an order.

Select the compound according to the electrical assembly design, operating temperature, moisture exposure and seal-material compatibility requirements.

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For authoritative specifications, consult the official MOLYKOTE 4 Electrical Insulating Compound product page and the manufacturer’s technical data sheet.