Dow Corning 1689223, DOWSIL 1-2577 Conformal Coating, 8lb 1 Gal Pail
Dow Corning 1689223 — DOWSIL 1-2577 Conformal Coating, 8 lb 1-Gallon Pail
DOWSIL 1-2577 is a one-part, solvent-borne silicone conformal coating designed for protective coating of rigid and flexible circuit boards and Printed Wiring Board (PWB) applications requiring toughness and abrasion resistance. It cures at room temperature to a tough, elastoplastic, resilient, abrasion-resistant surface with UV fluorescence for automated inspection. Approved to MIL-I-46058C, IPC-CC-830, and UL 94 V-0 flammability standards — making it a trusted choice for military, aerospace, and high-reliability commercial electronics applications.
One-part silicone | Room temp cure | MIL-I-46058C & IPC-CC-830 approved | UV fluorescent | UL 94 V-0
Industries & Applications
- Military & Aerospace Electronics — MIL-I-46058C Amendment 7 approved; suitable for defense and aerospace PCB assemblies requiring certified conformal coating
- High-Reliability Commercial Electronics — IPC-CC-830 compliant for commercial assemblies requiring traceable, standards-based conformal coating documentation
- Automotive Electronics — Elastoplastic cure withstands thermal cycling and vibration; protects ECUs and sensor boards from moisture and contamination
- Industrial Control & Power Electronics — Protects control boards from humidity, chemical exposure, and abrasion in harsh industrial environments
- Flexible PCB Assemblies — Elastoplastic coating accommodates board flex without cracking or delaminating
- In-Line Automated Coating — UV fluorescence enables automated optical inspection of coating coverage in production environments
Key Features
- Tough, elastoplastic cure — resilient, abrasion-resistant surface protects PCBs from mechanical stress and environmental exposure
- One-part, room temperature cure — no mixing or ovens required; optional mild heat acceleration after solvent flash-off
- UV fluorescent indicator — enables automated optical inspection of coating coverage
- UL 94 V-0 rated — self-extinguishing flammability classification
- MIL-I-46058C & IPC-CC-830 approved — meets military and IPC conformal coating standards
- Compatible with no-clean and lead-free solders — good adhesion to low-solids flux residues common in modern assembly
- Suitable for rigid and flexible PCBs — elastoplastic cure accommodates board flex without cracking
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 1689223 |
| Product | DOWSIL 1-2577 Conformal Coating |
| Chemistry | One-part solvent-borne silicone resin |
| Net Weight | 8 lb |
| Volume | 1 gallon pail |
| Cure Method | Room temperature cure (no oven required) |
| Heat Acceleration | Optional mild heat after solvent flash-off |
| UV Indicator | Yes — fluorescent under UV for automated inspection |
| Flammability | UL 94 V-0 |
| UL Recognition | UL 746E / UL 746C Recognized |
| Military Approval | MIL-I-46058C, Amendment 7 |
| IPC Approval | IPC-CC-830, Amendment 1 |
| SKU | 1689223 |
DOWSIL 1-2577 Available Package Sizes
| Part Number | Size | Best For |
|---|---|---|
| 1689223 | 8 lb / 1-gallon pail | Production coating operations; dip, spray, or brush application |
| 1693247 | 18.1 kg pail | High-volume production with automated coating equipment |
| 453G (Dow Corning 1-2577) | 453g | Smaller batch production or lab use |
Frequently Asked Questions
Does DOWSIL 1-2577 require an oven to cure?
No — 1-2577 cures at room temperature without an oven. Optional mild heat can be applied after the solvent has flashed off to accelerate cure for faster in-line processing throughput.
Is DOWSIL 1-2577 approved for military applications?
Yes — 1-2577 is approved to MIL-I-46058C Amendment 7 and IPC-CC-830 Amendment 1, making it suitable for military, aerospace, and high-reliability electronics requiring certified conformal coating.
How is coating coverage inspected?
DOWSIL 1-2577 contains a UV fluorescent indicator that fluoresces under UV light, enabling automated optical inspection systems to verify coverage and detect missed areas or thin spots.
Is 1-2577 compatible with no-clean solder processes?
Yes — 1-2577 has good adhesion to many low-solids (no-clean) flux residues and is compatible with lead-free solder assemblies, making it suitable for modern PCB manufacturing processes.
What application methods work with DOWSIL 1-2577?
DOWSIL 1-2577 can be applied by dipping, spraying, or brushing. The 1-gallon pail format is well-suited for production-scale dip or spray coating operations. Contact MTE Solutions at 651.600.3838 for application equipment recommendations.
What other DOWSIL 1-2577 sizes does MTE Solutions carry?
MTE Solutions carries the 8 lb 1-gallon pail (1689223) and the 18.1 kg high-volume pail (1693247). Contact us for quantity pricing and availability.
