Name: Momentive TSE397-C Silicone Sealant 300ml
Price: 41
Availability: InStock

Momentive TSE397-C Silicone Sealant 300ml is a clear, one-component, fast-curing silicone adhesive sealant designed for electrical and electronic components, PCB assemblies and general industrial bonding. Its non-corrosive alkoxy cure system provides reliable adhesion to metals, including copper, as well as plastics, ceramics and glass while maintaining excellent flexibility and electrical insulation after curing.

Table of Contents

Product Overview

Momentive TSE397-C is a semi-flowable silicone adhesive and sealant that cures when exposed to moisture in the air.

Unlike acidic silicone systems, TSE397-C releases alcohol during curing and is designed to be non-corrosive to metals. It passes the MIL-A-46146B corrosion test and is therefore especially suitable for sensitive electrical and electronic assemblies.

Momentive TSE397-C Silicone Sealant 300ml forms a flexible silicone rubber after curing and provides excellent resistance to heat, cold, moisture, weathering, ozone and many chemicals.

Its semi-flowable consistency also makes it suitable for applications requiring the adhesive to flow around components, fill small gaps or form a protective coating.

Key Features and Advantages

Fast Cure

TSE397-C has a typical tack-free time of approximately 10 minutes at 23°C.

This relatively fast surface cure helps improve production efficiency in electronic assembly, sealing and coating operations.

Non-Corrosive to Metals

One of the most important advantages of TSE397-C is its non-corrosive curing system.

It is suitable for metals including copper and other electronic materials where acidic silicone sealants may create corrosion concerns.

One-Part Application

No separate hardener or mixing process is required.

The material can be dispensed directly from the cartridge and cures through atmospheric moisture, simplifying application and reducing mixing errors.

Semi-Flowable Consistency

Momentive TSE397-C Silicone Sealant 300ml has a typical viscosity of approximately 50 Pa·s at 23°C.

Its semi-flowable nature makes it particularly useful for thin-section potting, small-gap filling, coating and component encapsulation.

Excellent Electrical Insulation

The cured silicone provides excellent electrical insulation performance.

Typical dielectric strength is approximately 22 kV/mm and volume resistivity is approximately 2 × 10¹⁵ ohm-cm.

Wide Temperature Resistance

TSE397-C can operate over a broad temperature range from approximately -55°C to +200°C.

This makes it suitable for electronics and industrial equipment exposed to both low and elevated temperatures.

Primerless Adhesion

Momentive states that TSE397 provides good primerless adhesion to many common substrates including metals, many plastics, ceramics and glass.

Surface cleaning is still recommended before bonding to achieve consistent performance.

Applications of Momentive TSE397-C Silicone Sealant 300ml

PCB and Electronic Components

TSE397-C is particularly suitable for bonding, sealing and protecting components on printed circuit boards.

It can help protect electronic assemblies against moisture, vibration and environmental contamination.

Electrical Insulation

The high dielectric strength and volume resistivity make the product suitable for insulation around electronic and electrical components.

Thin-Section Potting

The semi-flowable consistency allows the material to flow into narrow spaces and around small components, making it useful for thin-section potting and encapsulation.

Gap Filling

TSE397-C can fill small surface voids and irregular gaps between components.

Protective Coating

The material can be applied as a flexible protective coating over selected electronic components and assemblies.

Metal, Plastic and Glass Bonding

Momentive TSE397-C Silicone Sealant 300ml can also be used for general bonding and sealing of metals, plastics, ceramics and glass.

Technical Information

Brand: Momentive

Model: TSE397-C

Product Type: Fast-Cure Silicone Adhesive Sealant

Capacity: 300ml

Color: Clear / Translucent

Consistency: Semi-Flowable Paste

Curing System: One-Part Alkoxy Moisture Cure

Corrosion: None under MIL-A-46146B Test

Viscosity at 23°C: Approx. 50 Pa·s

Tack-Free Time at 23°C: Approx. 10 Minutes

Density at 23°C: Approx. 1.04 g/cm³

Hardness: Approx. Shore A 13

Tensile Strength: Approx. 1.2 MPa

Elongation at Break: Approx. 300%

Adhesive Strength: Approx. 1.0 MPa

Thermal Conductivity: Approx. 0.18 W/m·K

Volume Resistivity: Approx. 2 × 10¹⁵ Ω·cm

Dielectric Strength: Approx. 22 kV/mm

Operating Temperature Range: Approx. -55°C to +200°C

Flammability Recognition: UL94 HB

Why Choose Momentive TSE397-C Silicone Sealant 300ml

Momentive TSE397-C Silicone Sealant 300ml combines fast curing, non-corrosive chemistry, electrical insulation and flexible environmental protection in a convenient one-component system.

Its excellent compatibility with electronic metals, including copper, makes it particularly suitable for PCB assemblies and electrical applications.

The semi-flowable consistency provides additional advantages for filling narrow gaps, coating components and thin-section potting where a highly thixotropic paste may not flow sufficiently.

For electronics, communication equipment, measuring instruments and general industrial assemblies, TSE397-C provides a dependable silicone bonding and protection solution.