3M Scotch-Weld SCOTCH-WELD EC-3515 B/A FR BLACK (1.6-kg-Kit)

Additional Product Information

Overview

3M Scotch-Weld SCOTCH-WELD EC-3515 B/A FR BLACK (1.6-kg-Kit) is a two-part flame-retardant epoxy void filling compound designed for storage, application, and curing at room temperature. It is specifically developed for void filling, edge sealing, and abradable compound applications. When mixed and fully cured, the material is available in black (or blue depending on variant).

• Two-part flame-retardant epoxy compound
• Designed for void filling, edge sealing, and abradable applications
• Cures at room temperature
• Available in black (mixed and cured color)
• 100% solids formulation
• Thixotropic properties for ease of application
• Base (blue or black) and white accelerator allow visual confirmation of proper mixing
• Provides localized stiffness and impact resistance for honeycomb structures

Key Technical Specs

• Cure time: 48 hours at 75 °F (24 °C)
• Work life: > 90 minutes for 200 g mass
• Mix ratio (by weight): 100 grams Part B to 94 grams Part A
• Cure example: 5 hours at 52 °C / 125 °F
• Form: Thixotropic compound
• Composition: 100% solids
• Density: Low-density cured material (no numerical value specified)

Approvals & Specifications

• Designed to meet flammability requirements of 14 CFR / CS 25.853 (a)

Typical Aircraft MRO / AOG Applications

• Void filling in structural and non-structural aircraft components
• Edge sealing of honeycomb panels
• Abradable compound applications
• Repair and reinforcement of honeycomb structures
• Providing localized stiffness in composite assemblies
• Impact resistance enhancement for panel edges

Compatibility & Safety Notes

• Apply only to thoroughly cleaned, dry, and grease-free surfaces for optimal performance
• Mix until a uniform color is achieved to ensure proper curing
• Do not exceed usable quantity within the material work life
• Larger mix quantities and higher temperatures accelerate reaction time
• For industrial mixing, use equipment that does not crush embedded glass microspheres

Packaging & Procurement

• Supplied as a 1.6 kg kit
• Includes Part A and Part B components
• Available in black variant (final cured color)

Why 3M Scotch-Weld SCOTCH-WELD EC-3515 B/A FR BLACK (1.6-kg-Kit) is Chosen for AOG / MRO

• Room temperature curing supports rapid deployment in field conditions
• Flame-retardant formulation meets aerospace safety requirements
• Long working time allows controlled application during repairs
• Thixotropic nature enables precise placement without sagging
• Visual mix indication reduces risk of improper preparation
• Provides structural reinforcement and sealing in one material

Practical Suggestions for Your Team (AOG Mindset)

• Prepare only the quantity required to avoid material waste due to limited work life
• Ensure strict surface preparation standards to maximize bond performance
• Use controlled mixing methods to maintain integrity of microspheres
• Plan application timing carefully, especially in elevated temperature environments
• Verify uniform color during mixing to ensure proper component integration

Manufacture / Aviation Spec Codes

• EC-3515 B/A FR
• 3M Scotch-Weld Void Filling Compound designation

Alternative Names & Descriptions

• 3M Scotch-Weld EC-3515 B/A FR Void Filling Compound
• Flame-retardant epoxy void filler
• Honeycomb edge sealing and reinforcement compound
• Two-part aerospace epoxy filler