TSE399 Silicone Adhesive Sealant Flowable

TSE399 Flowable One-component, fast cure, non-corrosive silicone adhesive sealant

TSE399 is a one-component, fast cure, non-corrosive silicone adhesive sealant that cures on exposure to atmospheric moisture to form an elastic silicone rubber. TSE399 has a flowable consistency and excellent corrosion-free adhesion to metals, including copper, plastics, ceramics, glass, etc. without the use of primers. TSE392, TSE397 and TSE399 adhesive/sealants/coatings are one component RTV’s that cure quickly by reacting with atmospheric moisture forming a soft dielectric silicone rubber. These materials incorporate a newly developed crosslinking chemistry and are non-corrosive to metallic substrates. They are particularly well suited for electrical/electronic applications.
This series of products differ in consistency, TSE392 is a thixotropic paste, TSE397 is semi-flowable, and TSE399 is flowable. When cured, they retain their elastomeric properties throughout the operating range of temperature from -55C to 200°C (-67F to 392F).

TSE399 Product Features

• Meets the corrosion resistant requirements of MIL-A-46146A*
• Fast cure at ambient temperatures
• Odor, slight alcohol
• Outstanding adhesion, including most plastics
• Outstanding electrical properties
• Resistant to heat, cold, moisture, UV, ozone and chemical
• * Does not meet hydrolytic stability requirement of MIL-A-46146A

TSE399 Product Benefits

• One component, no mixing or de-airing required
• Soft consistency provides protection against mechanical and thermal shock
• Excellent electrical insulation
• Protects against moisture
• Varying viscosities allow thorough coating around complex assemblies (TSE399) and thicker coatings where required i.e., high voltage components (TSE392 & TSE397).
• Convenient packaging/dispensing tubes or cartridges.

TSE399 Processing Recommendations

Surface Preparation
Insure that surfaces to be sealed, coated or bonded are clean and free of grease, lubricating oils, release agents and dirt. To optimize fast cure and good adhesion, substrates must be thoroughly dry of cleaning solvents before applying the RTV. The RTV should be applied to one surface only. Wipe away excess uncured material with a clean cloth. After curing, removal of material is more difficult.

Bonding
These products offer primerless adhesion to many substrates including most plastics. Maximum adhesion is obtained 72 hours after full cure is obtained (2 mm thick specimen to an aluminum substrate).

Curing
These products cure at room temperature reacting with atmospheric moisture. Whenever possible, 25°C (77°F) and 50% relative humidity should be provided. Higher temperature and humidity will cause faster cures while lower temperatures and lower humidity will slow the cure considerably.
These products cure from the outside (outer skin) inward, therefore, cure rate is also dependent on the thickness of the material. It is not recommended to apply material thicker than 1/4 inch.

Limitations
Customers must evaluate Momentive Performance Materials products and make their own determination as to fitness of use in their particular applications.

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