3M Scotch-Weld SCOTCH-WELD DP420NS BLACK (50-ml-Cart)

Additional Product Information

Overview

3M Scotch-Weld Epoxy Adhesive DP420 is a high-performance, two-part epoxy adhesive designed for demanding assembly and repair in aviation and MRO environments. Teams rely on it for its strong shear and peel strength, chemical resistance, and predictable worklife, ensuring reliable structural bonds in critical applications.

Key Technical Specs for 3M Scotch-Weld Epoxy Adhesive DP420

• Type: Two-part epoxy adhesive
• Size/Volume: 50 ml, 200 ml, 400 ml duo-pak cartridges
• Color: Black, Off-White, NS Black, Low Halogen (LH)
• Viscosity/Consistency: Base 20,000 50,000 cP; Accelerator 8,000 14,000 cP (varies by variant)
• Cure/Working Time: 15 20 minutes at 73 F (23 C)
• Tensile/Peel Strength: Overlap shear up to 5,000 psi; T-Peel 50 PIW at 73 F (23 C)
• Shore Hardness: 75 80 (D)
• Service Temperature: -55 C to 121 C (-67 F to 250 F)
• Typical Uses: Metal-to-metal, plastics, composites bonding in MRO, structural repair, and industrial assembly
• Shelf Life: 24 months from manufacture when stored at 60 80 F (15 27 C)

Approvals & Specifications

• UL 94 HB Horizontal Burn Flammability (DP420 Off-White)
• Low Halogen Compliant (DP420 LH, <900 ppm Cl, <900 ppm Br)
• Meets typical aerospace and OEM bonding standards

Typical Aircraft MRO / AOG Applications

• Structural bonding of aluminum airframe components
• Composite panel repairs and assembly
• Metal and plastic subassembly bonding in aircraft interiors
• Emergency AOG repairs requiring quick strength build-up
• Maintenance of electronic housings and avionics enclosures

Compatibility & Safety Notes

• Compatible with aluminum, steel, copper, brass, stainless steel, ABS, PVC, polycarbonate, FRP, and composites
• Use appropriate PPE: gloves, safety glasses, ventilation
• Follow recommended surface preparation for optimal adhesion (etch, degrease, or abrade as needed)
• Handle mixed adhesive carefully; avoid skin and eye contact

Packaging & Procurement

• Available in 50 ml, 200 ml, and 400 ml duo-pak cartridges
• Supplied with 3M EPX Applicator System for precise dispensing
• Storage: 60 80 F (15 27 C) for maximum shelf life
• Easy to use manually or with automated dispensing systems

Why 3M Scotch-Weld Epoxy Adhesive DP420 is Chosen for AOG / MRO

• Fast strength build-up for quick repairs and assembly
• Reliable performance under extreme temperatures and chemical exposure
• Versatile for multiple substrates and applications
• Portable and easy to deploy for field and hangar use

Practical Suggestions for Your Team (AOG Mindset)

• Keep small kits of DP420 Black or Off-White on hand for emergency repairs
• Ensure proper training on mixing ratio and surface preparation
• Stock compatible applicators and nozzles for rapid dispensing
• Follow manufacturer s curing guidelines for predictable bond performance

Manufacture / Aviation Spec Codes

• Manufacturer: 3M
• Product ID: DP420 Black, DP420 Off-White, DP420 NS Black, DP420 LH
• MIL/OEM/Export Codes: UL 94 HB, IEC 61249-2-21 (Low Halogen)

Alternative Names & Descriptions

• 3M Scotch-Weld DP420 Black Epoxy
• 3M Scotch-Weld DP420 Off-White Epoxy
• 3M Scotch-Weld DP420 NS Black Epoxy Adhesive
• 3M Scotch-Weld DP420 LH Low Halogen Epoxy
• 3M Two-Part Structural Epoxy DP420