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3M™ Scotch-Weld™ Epoxy Adhesive DP125 Translucent/Gray – Fast-curing, flexible adhesive for metals, plastics, and glass

Item Name: 3M™ Scotch-Weld™ Epoxy Adhesive DP125 Translucent and Gray
Manufacturer: 3M
Technologies: Two-part epoxy adhesive; faster cure than 2216 B/A; Duo-Pak cartridge or bulk mixing; controlled flow
Color: Translucent/Amber (Base & Accelerator); Gray/Amber (DP125 Gray)
Cure Type: Room temperature cure (7 days full cure at 75°F / 24°C); heat accelerates cure to 200°F (93°C)
Package Size: Duo-Pak cartridges (48.5–50 ml); bulk containers
Shelf Life: 24 months unopened

1. Product Overview

3M™ Scotch-Weld™ Epoxy Adhesive DP125 (Translucent and Gray) is a fast-curing two-part epoxy adhesive, derived from the DP2216 Translucent B/A, but with significantly reduced worklife and cure time. The DP125 Gray version is a filled, pigmented variant with similar performance and flexibility. It features a 25-minute worklife, high peel and shear strength, controlled flow, and flexibility. Available in Duo-Pak cartridges or bulk containers.


2. Applications

  • Structural bonding of metals, plastics, rubbers, wood, and glass

  • High-strength applications requiring fast cure time and flexible bonds

  • Industrial bonding where controlled flow and high peel/shear strength are required

  • Applications using 3M™ EPX Applicator System or bulk mixing for production/field use

Note: Surface preparation is critical for optimal bond strength. Performance may vary under prolonged humidity, heat, or immersion; testing is recommended.

3. Typical Properties

Uncured Properties

Property DP125 Translucent DP125 Gray
Base Resin Epoxy/Amine Epoxy/Amine
Viscosity Base (cps @ 80°F) 2,000–8,000 35,000–75,000
Viscosity Accelerator (cps @ 80°F) 22,000–33,000 45,000–65,000
Net Weight Base (lbs/gal) 9.3–9.7 10.3–10.7
Net Weight Accelerator (lbs/gal) 8.4–8.6 8.5–8.9
Color Base Clear Gray
Color Accelerator Amber Amber
Mix Ratio Volume 1:1 1:1
Mix Ratio Weight 1.1:1 1.2:1
Worklife @ 73°F (2–20 g) 25 min / 18 min 25 min / 15 min

Cured Properties

Property DP125 Translucent DP125 Gray
Color Translucent Gray
Shore D Hardness 55 70
Tack-Free Time ≈ 2 hrs ≈ 2 hrs
Handling Strength ≈ 2.5 hrs ≈ 2.5 hrs
Full Cure Time 7 days 7 days
Elongation 150% 120%
Tensile Strength 2,500 psi 3,300 psi
Thermal Coefficient of Expansion (TCE, 10⁻⁶/°C) Below Tg: 112, Above Tg: 190 Below Tg: 98, Above Tg: 187
Glass Transition Temperature (Tg) Onset: 3°C, Mid: 15°C Onset: 12°C, Mid: 23°C
Thermal Conductivity (BTU·ft/ft²·hr·°F) 0.089 0.087
Thermal Shock Resistance Pass 5 cycles (+100°C to -50°C) Pass 5 cycles (+100°C to -50°C)
Dielectric Constant @ 1 kHz 6.3 6.3
Dissipation Factor @ 1 kHz 0.14 0.13
Dielectric Strength (volts/mil) 765 680
Volume Resistivity (ohm·cm) 1.2 × 10¹¹ 1.0 × 10¹¹

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