3M SJ3518FR/BLACK/L (1-Inch-Roll)

3M™ Fastener SJ3518FR Loop Flame Resistant

Overview

3M™ Fastener SJ3518FR Loop Flame Resistant is a pressure-sensitive adhesive-backed nylon loop fastener designed to provide a lightweight, reusable fastening solution for aerospace, rail, and industrial applications. Engineered as part of the 3M™ Flame Resistant Hook and Loop Fastener system, it offers thousands of opening and closing cycles while meeting aerospace flammability requirements. The fastener provides an alternative to mechanical fasteners such as screws, snaps, bolts, and zippers, enabling faster assembly, improved aesthetics, and simplified maintenance.

Key Technical Characteristics

• Product Type: Flame-resistant adhesive-backed loop fastener
• Fastener Type: Nylon hook-and-loop closure system
• Backing Material: Nylon 6,6
• Loop Material: Nylon 6,6
• Adhesive Type: Flame-resistant synthetic rubber pressure-sensitive adhesive
• Available Colors: Black, White, Beige
• Maximum Unmated Thickness: 3.2 mm
• Engaged Thickness: 3.9 mm
• Long-Term Temperature Resistance: 70�C
• Typical Cycle Life: 5,000 opening and closing cycles
• Shelf Life: 18 months from date of manufacture

Core Performance Benefits

• Provides a reusable fastening solution with up to 5,000 closure cycles
• Flame-resistant construction suitable for aerospace interior applications
• Pressure-sensitive adhesive enables fast installation without mechanical hardware
• Offers cleaner exterior surfaces compared to conventional fasteners
• Excellent dimensional stability through pre-shrunk nylon construction
• Maintains strong adhesion across a range of temperature and humidity conditions
• Reduces assembly time and simplifies maintenance access
• Compatible with multiple 3M™ flame-resistant hook fasteners

Typical Applications

• Aircraft interior panels
• Aircraft seating systems
• Insulation blanket closures
• Electronic equipment access panels
• Rail vehicle interior panels
• Vibration and sound dampening assemblies
• Removable equipment covers
• General lightweight removable fastening applications

Material Engineering & Design Features

SJ3518FR utilizes woven Nylon 6,6 loop fabric coated with a flame-resistant synthetic rubber pressure-sensitive adhesive to create a durable reclosable fastening system. The loop material is designed to engage with compatible 3M™ hook fasteners while maintaining consistent closure performance over thousands of cycles.

Typical mechanical performance includes:

• 90� Peel Adhesion: 360 g/cm width
• Overlap Shear Strength: 16 N/cm�
• T-Peel Adhesion: 380 g/cm width
• Dynamic Tensile (Disengage): 8.1 N/cm�
• Cleavage Strength: 950 g/cm width

The adhesive system complies with major environmental directives including RoHS requirements and provides flame resistance when tested to FAR 25.853 and other common flammability standards.

Installation & Handling

• Apply only to clean, dry, contaminant-free surfaces
• Allow both substrate and fastener to stabilize between 21�C and 38�C before installation
• Apply firm pressure using a rubber roller or similar tool to ensure full adhesive contact
• Allow a minimum dwell time of 1 hour before applying loads or disengaging the fastener
• Ultimate adhesive strength is typically achieved after 24 hours at 22�C and 50% relative humidity
• Can also be attached using heat press bonding or mechanical fasteners where appropriate
• Not recommended for attachment to flexible vinyl or plasticized materials

Environmental & Compliance Notes

• Meets FAR 25.853 flammability requirements
• Compliant with RoHS and applicable EU chemical directives
• Meets MIL-F-21840G Type III Class 3 physical requirements
• Store between 16�C and 27�C with 40�60% relative humidity
• Store in original packaging away from direct sunlight
• Not recommended for repeated washing or dry cleaning when adhesively bonded
• Suitable for indoor applications across a wide range of temperature and humidity conditions

Key Advantages for Aerospace Use

• Lightweight alternative to mechanical fastening systems
• Flame-resistant construction suitable for aircraft interiors
• Supports fast installation and simplified maintenance access
• Provides durable reclosable performance over thousands of cycles
• Compatible with multiple 3M™ flame-resistant hook fasteners
• Improves appearance by eliminating visible hardware
• Meets aerospace flammability and military performance requirements
• Ideal for removable aircraft interior components and insulation systems