Loctite SI 5145 RTV Silicone Sealant

LOCTITE SI 5145 is a high-strength, clear, commercial-grade alkoxy silicone sealant and adhesive engineered explicitly for the bonding, sealing, and coating of sensitive electronic devices. This 1-part, neutral-curing RTV (Room Temperature Vulcanizing) silicone is formulated to resist severe environments, providing exceptional stability against weathering, moisture, and ozone without corroding delicate electronic circuitry.

LOCTITE SI 5145 specialized non-slumping formula prevents migration during application, making it the ideal solution for reinforcing and strain-relieving delicate components in military, automotive, and industrial electronic systems.

Key Features & Benefits

• Electronic-Grade Safety: Neutral-curing alkoxy formulation prevents the corrosion of sensitive electronics and delicate component connections.
• Non-Slumping Profile: High-viscosity structural integrity allows for clean placement, making it ideal for the reinforcement and strain relief of delicate components.
• Severe Environment Resistance: Provides industrial-strength defense against weathering, moisture, and ozone exposure.
• Military Specification Compliance: Tested to the stringent lot requirements of Military Specification Mil-A-46146B (regional approval).

Technical Specifications

• Product Designation: LOCTITE SI 5145
• Strength: High
• Color: Clear / Transparent
• Curing Type: Room Temperature Vulcanizing (RTV) / Moisture Cure
• Application Scope: Bonding, Sealing, or Coating
• Maximum Service Temperature: Up to 200°C
• Compliance Standard: Tested to Mil-A-46146B lot requirements
• Optimal Storage Temperature: 8°C to 21°C (Storage below 8°C or greater than 28°C can adversely affect product properties)

Usage & Application Guidelines

• Surface Preparation: For optimal bond performance, ensure all mating surfaces are thoroughly clean, dry, and entirely free from grease, oil, and industrial contaminants.
• Mating Timeline: Moisture curing initiates immediately upon atmospheric exposure. Components must be mated and assembled within a few minutes after the product is dispensed to secure proper wet contact.
• Full Cure Duration: Full performance properties and maximum environmental resistance will fully develop over a 72-hour period.
• Clean-Up Protocol: Excess uncured material can be easily wiped away and managed using Loctite 7063. Do not return contaminated material to the original container.

Frequently Asked Questions (FAQ)

Does LOCTITE SI 5145 comply with military engineering specifications for electronics?

Yes. LOCTITE SI 5145 is explicitly tested to the lot requirements of Military Specification Mil-A-46146B. Please note that this is a regional approval specification; contact your local technical service center for specific compliance documentation and clarification for your facility.

How long does it take for LOCTITE SI 5145 to achieve full cure performance?

While moisture curing begins immediately upon exposure to the atmosphere, full physical and chemical performance properties develop over a 72-hour window. Because skinning and curing begin instantly, parts should be aligned and mated within a few minutes of dispensing.

What are the explicit industrial storage rules to protect LOCTITE SI 5145 from degradation?

LOCTITE SI 5145 must be stored in its original, unopened container in a dry location at an optimal temperature range between 8°C and 21°C. Storing the sealant below 8°C or above 28°C can permanently damage or alter its physical performance traits. To maintain product integrity, never return material removed during assembly back into the original packaging.

Request Wholesale Pricing

We offer tiered bulk pricing to corporate procurement managers and electronic assembly engineers.

Please Contact Us directly to request a formal wholesale quote or to verify immediate inventory availability.