3M Scotch-Weld DP490 Gray Structural Epoxy Adhesive – 400 mL DuoPak for Production
3M Scotch-Weld DP490 is a high-performance gray structural epoxy adhesive available in the large 400 mL DuoPak cartridge format — one of the largest pre-mixed cartridge volumes in the Scotch-Weld range — designed for production-scale structural bonding operations where minimizing cartridge change frequency and maximizing bonding throughput are production efficiency priorities.
The 400 mL cartridge provides significantly more adhesive per cartridge than standard 48.5 mL and 200 mL formats, enabling continuous bonding of large structural assemblies and multiple joint operations from a single cartridge without interruption. This is particularly valuable in production environments where cartridge changes require stopping the production flow, cleaning the dispensing equipment, and installing a new cartridge — all of which reduce overall bonding throughput.
DP490 delivers strong structural bond strength on metal, composite, and plastic substrates with good resistance to aerospace fluids and thermal cycling. Its gray color provides a neutral appearance compatible with aluminum, steel, and composite aerospace structures, with good paintability for applications where the bond line is overcoated.
| Attribute | Detail |
|---|---|
| Manufacturer Part Number (MPN) | 7100076722 |
| Brand | 3M |
| Product Name | Scotch-Weld DP490 Gray |
| Color | Gray |
| Product Type | Two-Component Structural Epoxy Adhesive |
| Package Size | 400 mL DuoPak |
| Substrate Compatibility | Metal, Composite, Plastic |
| Application Method | Dual Cartridge Dispenser with Static Mixer |
| Industry Use | Aerospace, Defense, Industrial, Production MRO |
Technical Information
3M Scotch-Weld DP490 uses an optimized epoxy-amine chemistry providing high structural bond strength on metals and composites with good environmental resistance. The DuoPak dual cartridge format maintains the two components completely separated until dispensed through the static mixer, ensuring fresh, correctly proportioned adhesive at every dispense throughout the life of the 400 mL cartridge.
The large 400 mL format is compatible with 3M’s heavy-duty dispensing gun designed for the large DuoPak cartridge. This gun provides the mechanical advantage needed to extrude the higher-viscosity structural epoxy through the static mixer nozzle from the large cartridge volume without excessive operator fatigue during sustained production bonding operations.
Bond strength development of DP490 follows the typical epoxy cure profile — initial strength build in the first few hours at room temperature, approaching full strength over 24 hours. Surface preparation per the 3M DP490 TDS — including solvent cleaning and light abrasion of metal and composite substrates — is important for achieving the specified maximum bond strength on every production joint.
Why Choose 3M Scotch-Weld DP490 400mL?
- ✅ 400 mL Large Format — Maximum adhesive per cartridge for production efficiency
- ✅ Fewer Cartridge Changes — Uninterrupted bonding on large assemblies
- ✅ Structural Bond Strength — High lap shear on metals and composites
- ✅ Gray Color — Compatible with aerospace structure appearance
- ✅ 3M Scotch-Weld Quality — Trusted production structural adhesive
Applications
DP490 400 mL is used for aerospace large panel bonding, metal structure assembly, composite bracket bonding, and sustained production structural bonding operations where maximum cartridge volume and minimum change frequency improve throughput.
Frequently Asked Questions
Q: What is 3M Scotch-Weld DP490 used for?
A: DP490 is a structural epoxy adhesive for production-scale bonding of metals, composites, and plastics in aerospace and industrial manufacturing where large cartridge volume reduces production interruptions.
Q: What is the MPN for 3M DP490 400mL?
A: MPN is 7100076722.
Q: What special gun is needed for the 400mL DuoPak?
A: The 400 mL DuoPak requires 3M’s large-format heavy-duty dual cartridge dispensing gun. Standard 48.5 mL guns are not compatible with the larger cartridge format.
Q: How does DP490 compare to DP460 in terms of strength?
A: Both are high-performance 3M structural epoxies. DP460 is positioned as the premium maximum-strength toughened option. DP490 provides excellent structural performance for production applications. Refer to 3M TDS data for comparative bond strength on your specific substrates.
Q: What is the cure time for DP490 at room temperature?
A: DP490 achieves handling strength within several hours and approaches full strength in 24 hours at room temperature. Refer to the 3M DP490 TDS for specific cure schedule data.
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