Solvay BR6747-1/20% (1-US Gallon-Ctnr)

BR® 6747-1 Primer

Overview

BR® 6747-1 Primer is a one-part, chromate-containing, modified epoxy corrosion-inhibiting primer designed for aerospace bonding and structural protection applications. It is a 100% water-based, zero-VOC system that provides corrosion resistance and mechanical performance comparable to solvent-based primers while supporting modern environmental compliance requirements.

Key Technical Specs

• Product Type: One-part chromate epoxy corrosion-inhibiting primer
• VOC: 0% (100% water-based formulation)
• Service Temperature: -55°C to 177°C (-67°F to 350°F)
• Cure Range: 121°C to 177°C (250°F to 350°F)
• Recommended Dry Film Thickness: 0.0025–0.0076 mm (0.0001–0.0003 in)
• Color: Yellow
• Solids Content: 20% or 30%
• Density: 1.05–1.09 g/cc
• MEK Resistance: 20+ wipes after cure
• Salt Spray Resistance: 40+ days (ASTM B117)

Approvals & Specifications

• Approved for AC-130 bonding prep process (Boeing sol-gel system)
• Compatible with FM® epoxy adhesive systems (FM 73M, FM 87-1K, FM 300K, FM 300-2M, FM 377S)
• ASTM D1002, D3167, D1781, B117, D1654 compliance testing

Typical Applications

• Corrosion-inhibiting primer for aluminum aerospace structures
• Bond primer for structural adhesive bonding systems
• Adhesion promoter for stainless steel, titanium, and nickel alloys
• Aircraft composite and metal assembly bonding preparation

Performance Highlights

• High corrosion resistance under salt spray and chemical exposure
• Maintains hardness after exposure to fuels, oils, and hydraulic fluids
• Strong adhesive bonding performance across multiple epoxy systems
• Excellent MEK and chemical wipe resistance after curing

Application Guidelines

• Surface must be clean, dry, and grease-free before application
• Apply via HVLP, electrostatic, or conventional spray equipment
• Apply 2–3 thin box coats for uniform film build
• Allow 30–60 seconds flash-off between coats
• Dry time: 15–60 minutes at ~24°C and controlled humidity

Curing Process

• Cure at 121°C (250°F) for 60 minutes (standard)
• Alternative cure up to 177°C (350°F) for 60 minutes
• Primed assemblies remain stable for extended storage when protected

Storage & Shelf Life

• 12 months at 4–13°C
• 6 months at 14–24°C
• 30 days at 24–32°C
• Do not freeze or exceed 32°C

Safety & Handling

• Refer to SDS for full safety guidance
• Use appropriate PPE during spraying and handling
• Ensure proper ventilation in application areas
• Clean equipment with deionized water after use

Alternative Names & Descriptions

• Water-based aerospace epoxy bonding primer
• Chromate corrosion-inhibiting adhesive primer
• Structural bonding surface preparation primer