Scotch-Weld SCOTCH-WELD EC-3550 FST (400-ml-Kit)
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Introducing 3M Scotch-Weld 3550 B/A FST, a two-part, flame-retardant epoxy void filler ideal for aerospace use. It cures at room temperature and excels in void filling, edge sealing, and gap filling in metal and non-metal honeycomb structures, meeting FAR 25.853 (a) and (d) standards.
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Additional Product Information
Overview
3M Scotch-Weld 3550 B/A FST is a high-performance, two-part epoxy void filler designed for demanding aerospace applications. Its low-density, flame-retardant formula cures at room temperature and meets FAR 25.853 (a) and (d) fire safety standards, making it ideal for aircraft interiors. This versatile compound delivers exceptional performance in void filling, edge sealing, and complex gap-filling tasks across both metal and non-metal honeycomb sandwich structures.
Key Technical Specs for 3M Scotch-Weld 3550 B/A FST
- Type: Two-part epoxy void filler
- Cure: Room temperature
- Density: Low-density foam
- Viscosity: Paste
- Tensile Strength: High
- Typical Uses: Void filling, edge sealing, gap filling in aircraft interiors
- Shelf Life: 12 months (unopened)
Approvals & Specifications
- Meets FAR 25.853 (a) & (d) for fire safety
- Aerospace OEM approved
Typical Aircraft MRO / AOG Applications
- Aircraft interior void filling
- Honeycomb sandwich structure repair
- Edge sealing in composite panels
Compatibility & Safety Notes
- Compatible with metal and non-metal honeycomb structures
- PPE: Gloves and eye protection recommended
- Handle uncured epoxy with care
Packaging & Procurement
- Available in cartridge or dual-syringe packs
- Ready-to-use kits for small or large repairs
- Storage: Room temperature, away from direct sunlight
Why 3M Scotch-Weld 3550 B/A FST is Chosen for AOG / MRO
- Room-temperature cure simplifies on-site repairs
- Excellent flame-retardant performance
- Durable and versatile in void-filling applications
Practical Suggestions for Your Team (AOG Mindset)
- Keep cartridges for rapid interior repair tasks
- Train teams on mixing and dispensing techniques
- Plan for proper curing time before finishing
Manufacture / Aviation Spec Codes
- Manufacturer: 3M
- Product ID: 3550 B/A FST
- FAR 25.853(a) & (d)
Alternative Names & Descriptions
- 3M 3550 Epoxy Filler
- Scotch-Weld 3550 B/A
- 3550 B/A Void Filler
- 3M Aerospace Epoxy Filler
Restrictions
Recommended Alternatives
Shipping Information
- Orders over £50 online are eligible for FREE UK Mainland delivery.
- Collection for orders is available for all customers. At Checkout, please select 'Ex-Works/Collection'.
- European Delivery is available for selected countries. Shipping costs will be calculated according to the weight of the products.
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