Bonderite BONDERITE M-CR 871 AERO (40-ml-Pen)

Additional Product Information

Overview

BONDERITE M-CR 871 is a chromate-free, non-hexavalent chromium, dry-in-place conversion coating designed for aluminum and aluminum alloy surface protection and repair. This product is widely used in aviation maintenance, repair, and overhaul (MRO) operations to prepare aluminum surfaces for corrosion resistance and improved bonding performance in aircraft structural and exterior finishing systems.

Key Technical Specs for BONDERITE M-CR 871

• Type: Chromate-free metal pretreatment conversion coating
• Size/Volume: Applicator pen delivery system for localized surface repair
• Color: Wet film appears similar to a felt-tip marker; dried film ranges from nearly colorless to opaque blue iridescent depending on coating weight
• Viscosity/Consistency: Controlled low-viscosity treatment solution for surface wetting
• Cure/Working Time: Air dry system; second coat may be applied within 5 minutes after first coat dries; drying temperature not to exceed 60°C (140°F)
• Typical Uses: Aluminum corrosion protection, paint adhesion promotion, structural bonding preparation, and localized coating repair

Approvals & Specifications

• Meets Mil-DTL-81706B, Classes 1A and 3, Form VI, Method
• Listed on QPL/QPD qualification programs for the specification
• Chromate-free compliance for environmentally responsible metal pretreatment

Typical Aircraft MRO / AOG Applications

• Repair of scratched or abraded aluminum aircraft panels
• Surface preparation prior to aircraft repainting
• Bonding surface enhancement for structural adhesives
• Maintenance of exterior aluminum airframe components
• Touch-up treatment for localized corrosion protection
• Preparation of aluminum substrates for primer systems

Compatibility & Safety Notes

• Designed for aluminum and aluminum alloy substrates
• Surface must be clean, water-break free, and fully dry before application
• Do not puddle, rinse, or wipe after coating application
• Wear appropriate PPE such as clean gloves to prevent contamination
• Avoid finger oils, lint, and abrasive residues during processing
• Ensure applicator tip moisture is controlled to prevent over-saturation

Packaging & Procurement

• Supplied in portable applicator pen format for precision treatment
• Storage temperature: 0°C to 40°C (32°F to 104°F)
• Packaging designed for ease of field repair and AOG response readiness
• Cap must be replaced immediately after use to prevent evaporation and contamination

Why BONDERITE M-CR 871 is Chosen for AOG / MRO

• Rapid surface repair capability supports aircraft downtime reduction
• Portable applicator design enables field maintenance use
• Dry-in-place chemistry eliminates rinsing steps
• Provides reliable corrosion protection and adhesion promotion
• Suitable for precision localized treatment of damaged coatings

Practical Suggestions for Your Team (AOG Mindset)

• Maintain light but consistent moisture on applicator tip during use
• Train operators to apply overlapping strokes (10–25% overlap)
• Prepare surfaces using wet abrasion cleaning methods when possible
• Stock spare applicator tips for maintenance flexibility
• Perform small area trials before large-scale application

Manufacture / Aviation Spec Codes

• Manufacturer: Henkel
• Product Code: BONDERITE M-CR 871
• Military Specification: MIL-DTL-81706B
• Export / Technical Reference: Chromate-free aluminum conversion coating pen system

Alternative Names & Descriptions

• Chromate-free aluminum pretreatment pen
• Conversion coating touch-up applicator
• Dry-in-place corrosion protection coating
• Aluminum surface repair treatment pen
• Aircraft aluminum adhesion promotion coating