DOWSIL 3145/GREY (305-ml-Cart)

Additional Product Information

Key Technical Specifications

• Product Type: One-part RTV silicone adhesive/sealant
• Base Chemistry: Polydimethylsiloxane (PDMS)
• Appearance: Grey, non-flowing paste
• Cure System: Moisture-cure (room temperature)
• Temperature Range: -45°C to 200°C (-49°F to 392°F)
• Cure Time: Skin formation within minutes to 1 hour; full cure typically 24–72 hours
• Depth of Cure: Approx. 0.25 inch per 7 days (from exposed surface inward)
• Dispensing Method: Manual or automated needle dispense
• Mixing Requirement: None (single-component system)

Approvals & Specifications

• MIL Specification: MIL-A-46146 Group II/III, Type I
• Flammability Recognition: UL 94 recognized (subject to thickness requirements)
• Suitable for aerospace, electronics, and industrial applications requiring military specification compliance

Typical Aircraft MRO & AOG Applications

• Sealing openings in avionics modules and electronic housings
• Mechanical stabilization of electronic components
• Printed wiring board (PWB) assembly bonding and protection
• Sealing around electrical wires, leads, and connectors
• Yoke assembly and structural electronic sub-assemblies
• Rapid repair and sealing in AOG maintenance environments

Compatibility & Safety Notes

• Substrate Compatibility: Bonds well to metals, ceramics, glass, and selected plastics/resins
• Surface Limitations: Poor adhesion to non-reactive plastics such as polyethylene, polypropylene, and Teflon
• Surface Preparation: Cleaning with suitable solvents (e.g., mineral spirits, MEK) recommended
• Adhesion Enhancement: Light abrasion and primers may improve bond strength on difficult substrates
• Environmental Resistance: Suitable for intermittent solvent/fuel exposure (not continuous immersion)
• Safety Note: Ensure adequate ventilation during curing and follow standard silicone handling practices

Packaging & Procurement

• Supplied in 305 ml cartridge format
• Ready-to-use single-component system (no mixing required)
• Supports automated dispensing systems for production efficiency
• Suitable for high-volume electronics and aerospace manufacturing workflows

Why DOWSIL™ 3145 Is Chosen for MRO & AOG

• No-mix, room-temperature cure enables fast and simple application
• Excellent mechanical strength with high tensile and elongation properties
• Stable performance across wide operating temperatures (-45°C to 200°C)
• MIL-A-46146 compliance supports aerospace qualification requirements
• Fast handling strength improves turnaround in time-critical repairs
• Reliable electrical insulation and vibration protection for sensitive assemblies

Alternative Names

• DOWSIL 3145 RTV Silicone Adhesive
• Mil-Spec RTV Adhesive/Sealant (MIL-A-46146)
• Grey One-Part Silicone Electronic Adhesive
• RTV Moisture-Cure Silicone Potting and Bonding Compound